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A shallow cave carved out of a cliff wall below the Blue Mesa in Petrified Forest National Park, Arizona, United States of America, North America

Goblin Garden west of Hamilili Point in Petrified Forest National Park, Arizona, United States of America, North America

Patches of snow in the shade of a hill in Dead Wash at Petrified Forest National Park, Arizona, United States of America

Boulder pile in a valley leading to Dead Wash, Petrified Forest National Park, Arizona, United States of America

Cliff view of Dead Wash Valley in Petrified Forest National Park, at sundown, Arizona, United States of America

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

Mounds and cliffs of expansive clay called Bentonite in the Jasper Forest of Petrified Forest National Park, Arizona, United States of America, North America

A large petrified log along the Blue Mesa Trail in Petrified Forest National Park, Arizona, United States of America, North America

Panorama view of the Painted Desert from Tawa Point in Petrified Forest National Park, Arizona, United States of America, North America

Three hoodoos in a triangular formation in Devil's Playground called the Unholy Trinity, Petrified Forest National Park, Arizona, United States of America, North America

East slopes of Haystack Mesa in Petrified Forest National Park, Arizona, United States of America, North America

Closeup of the historic Agate House in Petrified Forest National Park, Arizona, United States of America, North America

A warning sign to stay on the trail to the historic Agate House in Petrified Forest National Park, Arizona, United States of America, North America

A deep canyon eroded thru the hills of purple and gray bentonite clay near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Purple badlands of bentonite near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Sign along the path to the Long Logs Trail, marking the Jim Camp Wash along the main road of Petrified Forest National Park, Arizona, United States of America, North America

A cliff overhang shaped like the head of a Duck west of Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

A hoodoo called the Zuni Warrior on the edge of a cliff near Hamilili Point, Hamilili is Zuni meaning petrified wood, Petrified Forest National Park, Arizona, United States of America, North America

A small hill of gray bentonite clay that appears to be melting into the purple bentonite of Hamilili Valley on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Purple hills of volcanic bentonite near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

A ridge of gray bentonite viewed from a nearby flat top mesa on the south end of Petrified Forest National Park, Arizona, United States of America, North America

A narrow slot canyon of bentonite on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Billings Gap Overlook on Blue Mesa towards sunset, Petrified Forest National Park, Arizona, United States of America, North America

The pedestal of Eagle Nest Rock in Jasper Forest Petrified Forest National Park, the rock fell down in 1941 due to heavy rain, Arizona, United States of America, North America

Red hills of bentonite clay overlooking Dead Wash in Petrified Forest National Park, Arizona, United States of America

The boundary fence on the east side of Petrified Forest National Park, Arizona, United States of America

An island of rock in an unnamed canyon that leads to Dead Wash in Petrified Forest National Park, Arizona, United States of America

An old Model-T placed as a marker for the Route 66 Road Alignment in Petrified Forest National Park, Arizona, United States of America

Red hills of bentonite clay overlooking Dead Wash in Petrified Forest National Park, Arizona, United States of America

Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

A rocky pile in Petrified Forest National Park called Newspaper Rock, where some rocks have petroglyphs, Arizona, United States of America, North America

Panorama of three hoodoos shaped like kings, on the edge of the Blue Mesa in Petrified Forest National Park, Arizona, United States of America, North America

Hills of blood red bentonite clay below Kachina Point in Petrified Forest National Park, Arizona, United States of America, North America

The map sign at the gateway for the Long Logs Trail and Agate House in Petrified Forest National Park, Arizona, United States of America, North America

The paved path, that used to be an old road, leading to the Long Logs Trail and Agate House in Petrified Forest National Park, Arizona, United States of America, North America

View of a bentonite hill along the Long Logs Trail in Petrified Forest National Park, Arizona, United States of America, North America

Islands of Rock in Hamilili Valley on the south end of Petrified Forest National Park, Arizona, United States of America, North America

A lone hoodoo rock on the edge of a ridge overlooking the Jim Camp Wash on the south end of Petrified Forest National Park, Arizona, United States of America, North America

A lone hoodoo rock on the edge of a ridge overlooking the Jim Camp Wash on the south end of Petrified Forest National Park, Arizona, United States of America, North America

View from below a ridge that overlooks the Jim Camp Wash on the south end of Petrified Forest National Park, Arizona, United States of America, North America

A dry waterfall on the west side of Hamilili Point, Hamilili being a Zuni word for petrified wood, next to a hoodoo on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Crumbling cliffs of a mesa near Hamilili Point in Petrified Forest, Arizona, United States of America, North America

The landmark in Petrified Forest National Park called Squared Off Butte, a marker on the way to Onyx Bridge, Arizona, United States of America, North America

The Little Teepees on the north side of Haystack Mesa in Petrified Forest National Park, Arizona, United States of America, North America

An unnamed canyon that leads to Dead Wash in Petrified Forest National Park, Arizona, United States of America

Red hills of bentonite clay overlooking Dead Wash in Petrified Forest National Park, Arizona, United States of America

Formation called Agate Mesa, viewed from a group of petrified wood in the foreground, Petrified Forest National Park, Arizona, United States of America, North America

A stone garden of Toadstool rocks on the south end of Keyhole Mesa in Petrified Forest National Park, Arizona, United States of America, North America

Man enjoying the view along The Petrified Forest Loop Trail inside Theodore Roosevelt National Park, North Dakota, United States of America, North America

A dome shaped hill of purple bentonite with a rocky flat top in Petrified Forest National Park, Arizona, United States of America, North America

A ridge of hoodoos that resemble dog heads in Devil's Playground at Petrified Forest National Park, Arizona, United States of America, North America

An information sign detailing the history of Agate House in Petrified Forest National Park, Arizona, United States of America, North America

A scenic overlook on the west side of the Giant Logs Trail at Petrified Forest National Park, Arizona, United States of America, North America

A deep canyon eroded thru the hills of purple and gray bentonite clay near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Rock islands just off a mesa near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

The sun shade shelter along the Long Logs Trail at Petrified Forest National Park, Arizona, United States of America, North America

Crystal Mesa above Crystal Creek west of Hamilili Point in Petrified Forest National Park, Arizona, United States of America, North America

View of the Petrified Forest National Park from the Long Logs Trail on the south end of the park, Arizona, United States of America, North America

Bighorn sheep petroglyph, Petrified Forest National Park, Arizona, United States of America, North America

Sand Castle formations on the edge of the Red Basin in Petrified Forest National Park, Arizona, United States of America, North America

A sheer cliff of rock jutting out from the Blue Mesa along the Billings Gap Trail in Petrified Forest National Park, Arizona, United States of America, North America

Field of hoodoos in Goblin Garden in the Flat Tops of Petrified Forest National Park, Arizona, United States of America, North America

The paved trail that leads to the historic Agate House in Petrified Forest National Park, Arizona, United States of America, North America

A scenic overlook on the west side of the Giant Logs Trail at Petrified Forest National Park, Arizona, United States of America, North America

A petrified tree log that has shattered over time, located on a mesa near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Small mesas with flat tops called Rock Islands on the south end of Petrified Forest National Park, Arizona, United States of America, North America

The North Valley below the Blue Mesa in Petrified Forest National Park, Arizona, United States of America, North America

Towering Hoodoos in the Jasper Forest of Petrified Forest National Park, Arizona, United States of America, North America

An Indian dwelling in Petrified Forest National Park called the Agate House, built between 1030AD and 1300AD, Arizona, United States of America, North America

A tall hoodoo called the Leviathan in Devil's Playground, Petrified Forest National Park, Arizona, United States of America, North America

Field of boulders in Devil's Playground within Petrified Forest National Park, Arizona, United States of America, North America

View of Jasper Forest in Petrified Forest National Park Arizona from the southern side of Agate Plateau.

The Giant Petrified Logs of Petrified Forest National Park, located along a trail behind the Rainbow Museum, Arizona, United States of America, North America

A large petrified log along the Blue Mesa Trail in Petrified Forest National Park, Arizona, United States of America, North America

Salt covered hills of Bentonite in the Petrified Forest National Park along the Blue Forest Trail, Arizona, United States of America, North America

Salt covered hills of Bentonite in the Petrified Forest National Park along the Blue Forest Trail, Arizona, United States of America, North America

The eastern edge of the Clam Bed Mesa along the Red Basin Trail in Petrified Forest National Park, Arizona, United States of America, North America

Keyhole Mesa, named for a keyhole shaped cave on its north side, in the First Forest of Petrified Forest National Park, Arizona, United States of America, North America

Three hoodoos in a triangular formation in Devil's Playground called the Unholy Trinity, Petrified Forest National Park, Arizona, United States of America, North America

A hoodoo ridge in Devil's Playground at Petrified Forest National Park, Arizona, United States of America, North America

Towering pillars of rock in Devil's Playground at Petrified Forest National Park, Arizona, United States of America, North America

The gateway to the Long Logs Trail and Agate House in Petrified Forest National Park, Arizona, United States of America, North America

A purple canyon with a dry creek in between hills of bentonite in Petrified Forest National Park, Arizona, United States of America, North America