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Diver looks on at sponges, coral and crinoids in a colorful Komodo seascape, taken at Cannibal Rock, Horseshoe Bay, Komodo National Park, Indonesia.

A trio of reef manta rays (Mobula alfredi) swimming above a reef top, Komodo National Park, Indonesia.

Hiker on ancient path used by villagers to cross the island North to South, on the heights of Santana, Madeira island, Atlantic Ocean, Portugal

Hikers on path along levada (aqueduct) of Green Cauldron (Caldeirao Verde), Madeira island, Atlantic Ocean, Portugal

Hiker on path along levada (aqueduct) of Green Cauldron (Caldeirao Verde), Madeira island, Atlantic Ocean, Portugal

Hikers on a path along levada (aqueduct) of Green Cauldron (Caldeirao Verde), Madeira island, Atlantic Ocean, Portugal

Shrine at entrance to levada tunnel (aqueduct) around Rabacal, Paul da Serra plateau, Madeira island, Atlantic Ocean, Portugal

Hikers on Rabacal levada walk towards the 25 Fountains cirque, Madeira island, Atlantic Ocean, Portugal

Young woman walking along Abra Bay, Sao Lourenco peninsula, Madeira island, Atlantic Ocean, Portugal

Young woman walking on Cevada islet, Sao Lourenco peninsula, Madeira island, Atlantic Ocean, Portugal

Eira do Serrado site above village Curral das Freiras (Nuns valley), Madeira island, Atlantic Ocean, Portugal

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

Cape Royal Road winding through Fuller Canyon at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The historic Salt Cabin dating back to 1870s near Greenland Lake at Grand Canyon North Rim, UNESCO, Arizona, United States of America

Highway US89A looking east to Vermilion Cliffs National Monument with Kaibab National Forest boundary sign, Arizona, United States of America

The west entrance of Supai Tunnel on North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

The Red Wall of sandstone east of Supai Tunnel on North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

Red Wall cliffs of Roaring Springs Canyon on North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

Ephemeral Spring on Red Wall of Roaring Springs Canyon, North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

The sheer cliff of the Red Wall along the North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

View above Red Wall Bridge crossing Roaring Springs Canyon, North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

Red Wall Bridge crossing Roaring Springs Canyon on North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

View of Roaring Springs Canyon along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

View of the Roaring Springs Canyon cliffs from the Red Wall Bridge, Grand Canyon North Rim, UNESCO, Arizona, United States of America

Lonely Boulders and exposed rock in Pleasant Valley, Kaibab National Forest just north of Grand Canyon North Rim, Arizona, United States of America

Looking back up the first leg of the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The Coconino Overlook along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The 11th switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

A curve in the North Kaibab Trail between Coconino Overlook and the Supai Tunnel Rest Area, Grand Canyon, Arizona, United States of America

The 20th switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The interior of the Supai Tunnel along the North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

Peles Castle in the Carpathian Mountains near the mountain resort of Sinaia, Wallachia region, Romania

Atlantic coast seen from the Sky Drive around Clifden, Connemara, County Galway, Connacht, Republic of Ireland

An ephemeral pool of water in the granite riverbed of the Agua Fria River Canyon in the Agua Fria National Monument of Arizona.

Sign marking Badger Springs Road off of I-17 Arizona. This road leads to a hiking trail in the Agua Fria National Monument.