One of America's first dinosaur parks gives a window into Depression-era paleontology.

This is one really big nut.

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

The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

An experimental, automotive replica of Stonehenge.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

One man's ambition created this psychedelic log home.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

A fiery crater has been burning in the Karakum Desert since 1971.

A notoriously corrupt Chief of Police's deteriorating Greek-themed playhouse.

Known as the site of 'El Dorado,' this mysterious lake is rumored to hold gold beneath its waters.

Ruins of a Carnegie family mansion on Cumberland Island.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

Stroll the grounds built by murder, suicide, and dirty oil money at one of Hollywood's most filmed mansions.

Some believe that this ancient mural depicts technology far ahead of its time, but in reality it's nothing quite out of place.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

20,000 pieces in a Frank Gehry-designed building.

The singular ruins of a mysterious lost city.

A short volcanic hill in Quito doubles as a stellar observation point of an iconic statue.