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An information sign on the summit of Apache Maid Mountai, Coconino National Forest, Arizona, United States of America

Fisheye view from below the fire watchtower on summit of Apache Maid Mountain, Coconino National Forest, Arizona, United States of America

Kalalau beach on the Kalalau trail, Napali Coast State Park, Kauai Island, Hawaii, United States of America, North America

Two hikers heading down the Navajo Loop Trail below Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America

Visitors looking down into Bryce Amphitheatre from the Rim Trail at Bryce Point, Bryce Canyon National Park, Utah, United States of America, North America

High cliffs towering above the Navajo Loop Trail below Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America

Typical rock hoodoos towering above the Mossy Cave Trail, Water Canyon, Bryce Canyon National Park, Utah, United States of America, North America

View over the Silent City from the Rim Trail at Inspiration Point, dawn, Bryce Canyon National Park, Utah, United States of America, North America

Least chipmunk (Neotamias minimus) on rocks beside the Queen's Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Colourful rock formation in the Queen's Garden beside the Navajo Loop Trail, Bryce Canyon National Park, Utah, United States of America, North America

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park in winter, UNESCO, Western Region, Iceland

Hermit Creek Canyon viewed from Dripping Springs Trail in the Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of Hermit Creek Canyon from a cliff near Santa Maria Springs along the Hermit Trail, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Old water pipe, Johnson Canyon between Bainbridge Steel and Stone Dams near Ash Fork, Kaibab National Forest, Arizona, United States of America

Large boulders balanced on a sloping ledge of Granite along the PMBA Trail in Constellation Park in Prescott, Arizona, United States of America, North America

Burial Ground for Slaves and Free Blacks up to 1854, containing 180 graves, St. Peter's Churchyard, St. George, Bermuda

Hiking the Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Fourth lake of valley of Five Lakes trail, Jasper National Park, UNESCO World Heritage Site, Canadian Rockies, Alberta, Canada, North America

Hikers looking at the view of Alpine mountains and Lake O'Hara from the Alpine circuit trail, Yoho National Park, UNESCO World Heritage Site, Canadian Rockies, British Columbia, Canada, North America

Hiker couple at the Alpine circuit trail looking down the Lake O'Hara, Yoho National Park, UNESCO World Heritage Site, Canadian Rockies, British Columbia, Canada, North America

Hiker looking at the view of Alpine mountains and Lake O'Hara from the Alpine circuit trail, Yoho National Park, UNESCO World Heritage Site, Canadian Rockies, British Columbia, Canada, North America

Woman hiker on the Alpine Circuit Trail at Lake O'Hara, Yoho National Park, UNESCO World Heritage Site, British Columbia, Canadian Rockies, Canada, North America

The Alpine Circuit Trail at Lake O'Hara, Yoho National Park, UNESCO World Heritage Site, British Columbia, Canadian Rockies, Canada, North America

Hiker on the Alpine Circuit Trail at Lake O'Hara, Yoho National Park, UNESCO World Heritage Site, British Columbia, Canadian Rockies, Canada, North America

Hiker couple enjoying the view of Lake Oesa on the Alpine Circuit Trail at Lake O'Hara, Yoho National Park,UNESCO World Heritage Site, British Columbia, Canadian Rockies, Canada, North America

Hooker Glacier Lake in the shadow of Mount Cook (Aoraki), Hooker Valley Trail, Mount Cook National Park, UNESCO World Heritage Site, Southern Alps, South Island, New Zealand, Pacific

Everest base camp hiking trail, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Yak on the Everest base camp trail, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Winter landscape and trail lights on Snake Pass, Peak District National Park, Derbyshire, England, United Kingdom, Europe

Los Glaciares National Park, UNESCO World Heritage Site, view from the El Chalten-Laguna Capri trail, Santa Cruz Province, Patagonia, Argentina, South America

Horse transport on the trail to Refugio Chileno, Torres del Paine National Park, Patagonia, Chile, South America

Hiker on a trail above Langdale, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Grand Canyon viewed from Bright Angel Trail just south of Indian Gardens at sundown, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon from the Desert View Trail a mile east of the historic Watch Tower with a lightning storm rolling into the area, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon view from the Tanner Trail with only the twilight glow as the light source, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of Escalante Butte in the Grand Canyon from the Tanner Trail just before sundown, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A red pool of salty water along the Blue Forest Trail in Petrified Forest National Park, Arizona, United States of America, North America

View from a side canyon along the Blue Mesa Trail in Petrified Forest National Park, Arizona, United States of America, North America

Mushroom shaped formations along the Blue Forest Trail in Petrified Forest National Park, Arizona, United States of America, North America

Beautiful waterfall of Vernal Fall on Merced River Mist trail, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Yosemite National Park sign for Glacier Point, Taft Point and Sentinel Dome, UNESCO World Heritage Site, California, United States of America, North America

Among giant redwoods on the Boy Scout Tree Trail in Jedediah Smith Redwoods State Park, UNESCO World Heritage Site, California, United States of America, North America

Among giant redwoods on the Boy Scout Tree Trail in Jedediah Smith Redwoods State Park, UNESCO World Heritage Site, California, United States of America, North America

Giant redwoods on the Lady Bird Johnson Trail in Redwood National Park, UNESCO World Heritage Site, California, United States of America, North America

Giant redwoods on the Lady Bird Johnson Trail in Redwood National Park, UNESCO World Heritage Site, California, United States of America, North America

Temperate rain forest on the Maple Glade Trail, Quinault Rain Forest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Temperate rain forest on the Maple Glade Trail, Quinault Rain Forest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Temperate rain forest on the Maple Glade Trail, Quinault Rain Forest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Waterfall on the Sol Duc Falls Trail, Sol Duc Valley, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Nursery log on the Rain Forest Nature Trail, Quinault Rain Forest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Lichen-covered trees on the Marymere Falls Trail, Quinault Rain Forest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Temperate rain forest on the Maple Glade Trail, Quinault Rain Forest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Photographer on the Sol Duc Falls Trail, Sol Duc Valley, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Storm Mountain from the Arnica Lake Trail in autumn, Banff National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

View along the Virgin River to Angels Landing from the Emerald Pools Trail, autumn, Zion National Park, Utah, 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

One of many fossil filled boulders in the Clam Beds along Red Basin Trail in Petrified Forest National Park, Arizona, United States of America, North America

Flat top hoodoo on the edge of a cliff along the Billings Gap Trail on Blue Mesa, Petrified Forest National Park, Arizona, United States of America, North America

Large storm approaching Blue Mesa in Petrified Forest National Park, viewed from the Red Basin Trail, near Holbrook, Arizona, United States of America, North America

The Twelfth Station of the Cross on the trail to the top of this tourist park with its world peace tower and worship houses of five major religions, Bukit Kasih, Minahasa, North Sulawesi, Indonesia, Southeast Asia, Asia

The summit of Haystack Mesa in Petrified Forest National Park, Arizona, United States of America, North America

Macro view of insect on a daisy flower from the trail of Diana's Peak National Park on Saint Helena, South Atlantic Ocean

View of landscape and trail lights in the Hope Valley at sunset, Peak District National Park, Baslow, Derbyshire, England, United Kingdom, Europe

View of landscape and trail lights in the Hope Valley at sunset, Peak District National Park, Baslow, Derbyshire, England, United Kingdom, Europe

Watchman mountain, Watchman trail, Zion National Park, Utah, United States of America, North America

Tourists entering natural arch while hiking Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Lone tree among hoodoos, Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Scenic view of rock formations from Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Scenic view of rock formations from Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Scenic view of hoodoos and rock formations from Queens Garden Trail near Sunrise Point, Bryce Canyon National Park, Utah, United States of America, North America

Scenic view of hoodoos and rock formations from Queens Garden Trail near Sunrise Point, Bryce Canyon National Park, Utah, United States of America, North America

Scenic view of hoodoos and rock formations from Queens Garden Trail near Sunrise Point, Bryce Canyon National Park, Utah, United States of America, North America

Scenic view of hoodoos and rock formations, Rim Trail near Sunrise Point, Bryce Canyon National Park, Utah, United States of America, North America

Scenic view of hoodoos and rock formations, Rim Trail near Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America

Grand Canyon at sunset, Rim Trail near Yavapai Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North 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

The upper leg of the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The 18th switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The 23rd switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

Trail lights on road by Nezumita-mon Gate, entrance to Kanazawa Castle and Park at dusk, Kanazawa City, Ishikawa Prefecture, Honshu, Japan

Provoking Lake at dawn on Highland Backpacking Trail, Algonquin Provincial Park, Ontario, Canada, North America

Hooker Glacier Lake in the shadow of Mount Cook (Aoraki), Hooker Valley Trail, Mount Cook National Park, UNESCO World Heritage Site, Southern Alps, South Island, New Zealand, Pacific