The behemoth beasts engaged in an epic battle is the second-tallest statue in the contiguous United States.

A 1,500-year-old, 3-story subterranean city where ancient Persians took refuge in times of war.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

The abandoned remnants of a little sanctuary for world peace that fell into disrepair.

Take a giant yellow bird cage to the top of Elba's highest mountain.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.

Where hundreds of Japanese civilians committed suicide to avoid being captured by American soldiers during WWII.

A rare surviving example of a pre-WWII Japanese garden, restored after years of neglect.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

A wondrous old library overlooking the nation's capital.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

This rare basalt crater lake is used to study the Moon and Mars.

A desert that evokes the surreal.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

An icy lake tucked among jaw-dropping alpine panoramas.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

A mapping error in the 19th century made loggers think this section of the forest was underwater.