Simien Mountains Park Ranger, Dramatic mountain scenery from the area around Geech, UNESCO World Heritage Site, Simien Mountains National Park, The Ethiopian Highlands, Ethiopia, Africa

Aerial view of one of only three permitted uranium mines in Australia (share of profits go to aboriginal landowners), Ranger Uranium mine, Kakadu National Park, Northern Territory, Australia

Sign for Parque Nacional de Timanfaya, national park, designed by Cesar Manrique, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Ranger shack on the Sekonyer River, Tanjung Puting National Park, Kalimantan, Borneo, Indonesia, Southeast Asia, Asia

Elephant with ranger, Chitwan National Park, UNESCO World Heritage Site, Western Terai, Nepal, Asia

North view of Grand Canyon South Rim Arizona from the top floor of the historic Watchtower, taken through glass window, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

The Tusayan Museum building at Grand Canyon South Rim, Arizona, United States of America, North America

Cliff views south of Naji Point on the North Rim of Grand Canyon National Park, UNESCO World Heritage Site, 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

View from the summit of Crystal Mesa west of Hamilili Point 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

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

Ranger stations built on the water in Tanjung Puting National Park, Kalimantan, Borneo, Indonesia, Southeast Asia, Asia

Ranger stations built on the water in Tanjung Puting National Park, Kalimantan, Borneo, Indonesia, Southeast Asia, Asia

Aerial of Ranger Uranium mine in Kakadu National Park from which a share of the profits go to aboriginal landowners in the Northern Territory of Australia, Pacific

Lualenyi Game Reserve, near Tsavo National Park, Kenya, East Africa, Africa

Armed ranger in the Mgahinga Gorilla National Park in southern Uganda.

An armed, Uganda Wildlife Authority game ranger looking through binoculars in Kidepo Valley National Park in northern Uganda.

Miniature snake of the Liophidium family being held by park ranger at the Ankarafantsika National Park in northwest Madagasacar, Madagascar, Africa

Two curious brown bear cubs (Ursus arctos), inspecting and gnawing on park ranger and service boats at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

A park ranger at the Exit Glacier that has retreated rapidly due to global warming, Kenai Fjords National Park, Alaska, United States of America, North America

Two curious brown bear cubs (Ursus arctos), inspecting and gnawing on park ranger and service boats at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Two curious brown bear cubs (Ursus arctos), inspecting and gnawing on park ranger and service boats at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Two curious brown bear cubs (Ursus arctos), inspecting and gnawing on park ranger and service boats at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Two curious brown bear cubs (Ursus arctos), inspecting and gnawing on park ranger and service boats at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Two curious brown bear cubs (Ursus arctos), inspecting and gnawing on park ranger and service boats at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Park ranger with AK-47 Machine gun, Volcanos National Park, Rwanda

Park ranger with AK-47 Machine gun Volcanos National Park, Rwanda

A Mountain Gorilla (Gorilla beringei beringei) of the Muhoza group looks at a man in uniform, in Volcanoes National Park, Virunga mountain range, Rwanda.

Kiwi caught by a DOC Ranger, dug out his burrow to change the transmitter, Tongariro National Park, North Island, New Zealand

Ranger guide and hiking group run through lush jungle during a chimpanzee discovery hike in Cyamudongo Forest, Nyungwe Forest National Park, Western Province, Rwanda, Africa

Ranger with Rainbow Lorikeets at Bungalow Bay Koala Village, Horseshoe Bay, northcoast of Magnetic island, Great Barrier Reef Marine Park, UNESCO World Heritage Site, Queensland, Australia

Ranger guide explains the nature to a couple along the Igishigishigi Trail on the way to the Canopy Walkway, Nyungwe Forest National Park, Western Province, Rwanda, Africa

Ranger guide next to signpost on Igishigishigi Trail on the way to Canopy Walkway, Nyungwe Forest National Park, Western Province, Rwanda, Africa

Ranger guides and visitors maneuver their way through dense jungle during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guides and trackers during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guide and group of hikers in the lush jungle during a chimpanzee discovery hike in Cyamudongo Forest, Nyungwe Forest National Park, Western Province, Rwanda, Africa

Ranger showing baby crocodile at Bungalow Bay Koala Village, Horseshoe Bay, northcoast of Magnetic island, Great Barrier Reef Marine Park, UNESCO World Heritage Site, Queensland, Australia

Ranger showing echidna at Bungalow Bay Koala Village, Horseshoe Bay, northcoast of Magnetic island, Great Barrier Reef Marine Park, UNESCO World Heritage Site, Queensland, Australia

Two ranger guides with walking sticks in preparation for a hike through the jungle to the Canopy Walkway, Nyungwe Forest National Park, Western Province, Rwanda, Africa

Ranger guides and visitors maneuver their way through dense jungle during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guides and visitors maneuver their way through dense jungle during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guide and hiking group run through lush jungle during a chimpanzee discovery hike in Cyamudongo Forest, Nyungwe Forest National Park, Western Province, Rwanda, Africa

Ranger guides and visitors maneuver their way through dense jungle during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Smiling ranger guide on Canopy Walkway, Nyungwe Forest National Park, Western Province, Rwanda, Africa

Ranger guide and hiking group run through lush jungle during a chimpanzee discovery hike in Cyamudongo Forest, Nyungwe Forest National Park, Western Province, Rwanda, Africa

Ranger guide and young woman during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guides and trackers during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guides and visitors during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger showing baby crocodile at Bungalow Bay Koala Village, Horseshoe Bay, northcoast of Magnetic island, Great Barrier Reef Marine Park, UNESCO World Heritage Site, Queensland, Australia

Ranger showing python at Bungalow Bay Koala Village, Horseshoe Bay, northcoast of Magnetic island, Great Barrier Reef Marine Park, UNESCO World Heritage Site, Queensland, Australia

Grizzly warning sign, Mount Revelstoke Ranger Station, Meadows in the Sky, Revelstoke National Park, British Columbia, Canada

Demonstration of fire by volcanic heat with brushwood, Parque Nacional de Tiimanfaya, Montanas del Fuego, park ranger, family, UNESCO Biosphere Reserve, Lanzarote, Canary Islands, Spain, Europe

A park ranger climbs a ladder to enter the Balcony House cliff dwelling at Mesa Verde National Park, featuring cliff dwellings of ancestral Puebloans that are nearly a thousand years old, Cortez, Colorado, USA

Bartlett Cove Ranger Station, sign, Glacier Bay National Park, Alaska, USA

Ranger holds a two-year-old alligator (Alligator mississippiensis) on his arm, Safari Park, Everglades National Park, Florida, USA, North America

Mount Revelstoke Ranger Station, Meadows in the Sky, Revelstoke National Park, British Columbia, Canada

A park ranger watches as visitors climb a ladder to enter the Balcony House cliff dwelling at Mesa Verde National Park, featuring cliff dwellings of ancestral Puebloans that are nearly a thousand years old, Cortez, Colorado, USA

Sign, summit of Mount Revelstoke, Ranger Station, Meadows in the Sky, Revelstoke National Park, British Columbia, Canada

Ranger as a guide for tourists, Methodist Church, ghost town of Bodie, a former gold mining town, Bodie State Historic Park, California, United States of America, USA

Mountain ranger Brian Scheele on this way to Windy Corner on Mount McKinley, also know as Denali, in Alaska. He is pulling a sled, that together with his heavy backpack is containing all the gear like tents, clothing and food. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to Basecamp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage. Mount McKinley, native name Denali, is the highest mountain peak in North America, with a summit elevation of 20,321 feet (6,194 m) above sea level. At some 18,000 feet (5,500 m), the base-to-peak rise is considered the largest of any mountain situated entirely above sea level. Measured by topographic prominence, it is the third most prominent peak after Mount Everest and Aconcagua. Located in the Alaska Range in the interior of the U.S. state of Alaska, McKinley is the centerpiece of Denali National Park and Preserve.

A mountain ranger is digging out tents after a snowstorm covered them during the night in 14k camp on Mount McKinley, Alaska. Climbers are advised to spare no expense on a expedition-quality tent as it can mean the difference between life and death during a ferocious storm on Denali. Extra poles and repair materials are important in case of damage caused by storms. Plan to take extra pickets, wands or deadmen for tent anchors. Never leave a tent without anchoring it securely. Tents are lost each year due to sudden gusts of wind while the tent was left unattended or drying. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to base camp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage.

Climbing Ranger in Grand Teton National Park.

A Park Ranger gives a cultural tour to visitors at Mesa Verde National Park, a native merican site knowen for it's expansive cliff dwellings, in Southwest Colorado.

Mountain Ranger waiting to be picked up by a helicopter in Denali National Park, Alaska. Mount Hunter is in the background.

Mountain Ranger is hanging on a long line underneath a helicopter in Denali National Park, Alaska.

View taken from behind of a safari guide and women travelers standing in a parked jeep talking and looking out onto the savanna with binoculars on the Gabus Game Ranch at sunrise; Otavi, Otjozondjupa, Namibia

Parks guide with rifle, Sirmilik National Park, Bylot Island, Nunavut, Canada

Worker bottle-feeding an orphaned African elephant (Loxodonta africana) at the Sheldrick Elephant Orphanage, Nairobi, Kenya

Worker bottle-feeding an orphaned African elephant (Loxodonta africana) at the Sheldrick Elephant Orphanage, Nairobi, Kenya

Bengal tiger;Panthera tigris tigris), walking on a track, Jim Corbett National Park, Uttarakhand, India, Asia

Kruger National Park rangers cleaning in the river a tusk just extracted from the body of a naturally dead elephant (Loxodonta africana) in order to fight against poaching, Kruger NP, South Africa

Rangers of the Kruger National Park just extracted a tusk to the root for two hours from the body of a naturally dead elephant (Loxodonta africana) in order to fight against poaching, Kruger NP, South Africa

Kruger National Park ranger using an axe to extract a tusk from the body of a naturally dead elephant (Loxodonta africana) to combat poaching, Kruger NP, South Africa

Kruger National Park rangers carrying a tusk that has just been extracted to the root of the body of a naturally dead elephant (Loxodonta africana) in order to fight against poaching, Kruger NP, South Africa

Kruger National Park rangers carrying a tusk of Elephant (Loxodonta africana) just extracted and cleaned in the river to fight against poaching, Kruger NP, South Africa