Paths are maintained, but trees have taken over plots.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Oldest unrestored plantation house in America that is open to the public.

One of the oldest living oak trees in the Southeast.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

A 70,000-square-foot institution dedicated to a very literal, creationist perspective on the Book of Genesis.

The world's longest known cave system.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

Race through the maze, get your name on the sign.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Watch the newest land on the planet form before your eyes.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Three prestigious academic collections come together to create a world-class natural history museum.