Elevated freight railway turned wildly successful urban park.

A hand-built folk art installation covered with messages of God's love.

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

The remains of this hell for leather wild west town can still be found in the Arizona desert.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

A chessmaster's dream destination.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

An urban forest overtakes what was the greatest failure of utopic urban housing.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Erosion and time have created a naturally-formed water park.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

Less a museum than a bizarre fantasy world created by artists and engineers.

A floating museum that was sunk by a flood and left to rot in the tides.

This beautifully restored fortification kept the city safe for centuries.

The site of one of history's most indelible and horrific tragedies.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The oldest still-operating tavern in the United States was once owned by a pirate.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

An imposing Omani fortress surrounded by date palm trees.

The tiny airport in remote Newfoundland that inspired a hit musical is also a modernist architectural gem.

Seven people are buried in the middle of what's now a movie theater parking lot.