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

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

A memorial to the murdered Jews of Kaunas.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

Ever-growing collection of devils in art.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A fake Transylvanian castle houses a cathedral of antlers.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

Where Venice's gondolas go for a tune-up.

100 year tradition of fist fights, marked by marble footsteps.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

The metal leaves on this tree are engraved with the names of Holocaust victims.

Budapest's Communist-era statues, banished to the suburbs.

The plague quarantine island home to the alleged "Vampire of Venice."