Home to some of Indiana's last bison herds.

Famous for its bio-luminescent inhabitants, known as "dismalites."

The quiet resting place of a rock and roll legend.

This massive cave is a sight to behold.

Zipline through the deepest canyon in the eastern United States.

The wooden airship was the largest flying boat ever built.

This cave holds a surprisingly colorful variety of geological oddities.

This was the first ever National Lakeshore, established in 1966.

This nearly 200-foot tall limestone stack offers visitors amazing views and a chance to meet Paul Bunyan and Babe the Blue Ox.

A massive portrait of Abraham Lincoln created with approximately 24,500 pennies.

Five restored historic road bridges in a park along the Kalamazoo River.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

This shallow cave got its name from copious amount of human bones found inside.

The mounds at this site were reconstructed with the help of archaeologists and historians.

The site of the one and only battle of Lord Dunmore's War.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

Deep scars on the earth left by the Ice Age.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

From mining complex to industrial exhibition, this museum once played a major part in the X-Files.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Four hundred granite steps were built into this massive rock by the National Park Service.