The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.

An abandoned concrete jungle surrounded by a lush park.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Journey through a collection of over 35,000 Halloween items from all generations.

This historic Victorian mansion is allegedly so haunted that a signed waiver is required to enter.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

This abandoned five-star hotel is now a five-star urban exploration destination.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

An enormous, inside-out glass globe built in 1935.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Honoring Italian greats from Joe DiMaggio to Rocky Marciano.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

An abandoned desert hamlet swallowed up by sand.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The first KFC is on the National Register of Historic Places.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

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

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

Where beautiful signs live on forever.

One of the most remote and isolated villages on the Arabian Peninsula.