One of the most scenic falls in Massachusetts has a history of death and grim legend.

A reproduction of earth's many biomes.

A museum dedicated to the alleged Roswell Incident.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Floating man-made island and upscale restaurant.

The only visible piece of San Francisco's most famous shipwreck.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The world's longest known cave system.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The first declared National Monument in the United States.

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

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Potential high level nuclear waste storage site for the next 10,000 years and beyond.

Odd outsider art installations surround a Gold Rush-era ghost town.

A land of debatable treasure.

The most magnificent bottle house in a town strangely full of them.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.