Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A series of playful yellow penguins share a serious message about the environment.

A surreal statue honoring Prague's favorite literary son.

The oldest garden in Prague, once part of an medieval orchard.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

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

Macabre astrological automaton clock dating to the late 1400s.

San Francisco's newly reopened hands-on science museum.

This nonsensical smiling boat shuttles passengers between two places they could've easily walked between.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A Spanish-style estate that has traded black ties for rock concerts.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

This Norman castle has been the scene of assassination plots, religious persecution, and Nazi conspiracies throughout its long history.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

A genuine Tudor manor transported piece by piece from England.

America's second-oldest brick baseball stadium was home to a legendary WWII series that only sailors got to see.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.