Overall, lemurs are the most endangered mammal group in the world. In southwestern Madagascar, fewer than 2,000 ring-tailed lemurs may survive.

Under a swath of Kentucky hills and hollows is a limestone labyrinth that became the heartland of a national park. The surface of Mammoth Cave National Park encompasses about 80 square miles.

To prevent further destruction of its unique bounty, the area was designated a national monument in 1906 and a national park more than a half century later. If you are traveling west on I-40 ...

One of the world’s oldest national parks, Mount Rainier became part of the federal system in 1899, shortly after its last eruption. Park status was the culmination of a long campaign by John ...

Water and Ice Yoho National Park protects the upper watershed of the Kicking Horse River, a steep, unruly tributary of 33 miles. Much of the water comes from the Yoho River, ice cold and milky ...

Luminarias light Spruce Tree House, an ancient dwelling of the Anasazi people and the third largest cliff dwelling in Colorado's Mesa Verde National Park. From Cortez, take US 160 east for eight ...

But the people who discover Isle Royale treat this isolated realm like no other park: Isle Royale visitors typically stay there 3.5 days, while the average visit to a national park is about 4 hours.

Wood Buffalo is Canada’s largest national park. Covering more territory than Switzerland, it sprawls across northeastern Alberta and juts into the southern part of the Northwest Territories.

Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.

Robert F. Kennedy, Jr., calls the Great Bear Rainforest "the planet's last large expanse of coastal temperate rain forest." Stretching for more than 250 miles along the coast of British Columbia ...

When to Go: The canyon is open year-round. However, fall is the best time to revisit the sites that inspired the Group of Seven. Leaves usually change color late September through early October ...