One of the largest cat sanctuaries in North America is considered a "Club Med" for felines.

Located in Nairobi National Park, this animal orphanage is the oldest of its kind in Kenya.

See wolves, coyotes, and arctic foxes in a natural environment smack in the middle of New York State.

Britain's only herd of free-ranging reindeer.

Curious rock formations in a tiny Kansas state park.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

The highest peak in the state of Vermont has some interesting features.

A volcanic landmark located on an Ice age lake bed.

Visit this playground of waterfalls, caves and sinkholes.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Curious cave that stays a cool 56 degrees all year long.

Mountain known by the Tillamook Tribe as "the place of the supreme deity."

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

Bad farming practices caused this unnatural natural wonder.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

Even Henry David Thoreau found this glacial pothole irresistible.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

The only diamond mine in the world where you can keep what you find.

One of America's first planned communities is preserved in a state park.