Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Visit the monolithic tomb of America's most famous general.

A bit of retro transportation flair preserved in the world's largest department store.

Elevated freight railway turned wildly successful urban park.

This Transylvania County city is home to a rare white squirrel population that is descended from an escaped carnival animal.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

Georgia's highest point was given its strange name thanks to a simple translation error.

You thought Santa Claus didn't exist, but it turns out you were wrong.

This stately clubhouse has showcased German-American culture for over a century.

Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

This kitschy curio wonderland is full of fake animals, teak tables, and a cacophony of random bric-a-brac.

The strip club's VIP lounge is actually a rare repurposed Futuro House.

Electrical pylon in the shape of Disney's beloved mouse.

A lion given to the prime minister somehow got stuffed and sent to Florida.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

The world's largest private aircraft collection.

"We Seceded Where Others Failed."

One of the last of the great 1920s movie palaces is a Floridian Greco-Spanish-Persian dreamscape.

St. Augustine's record-setting narrow street was designed to protect against pirates.