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

According to Greek mythology, this natural spring is the home of a freshwater nymph.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

Thousands of well-dressed mummies below a monastery.

Every inch of this chapel is covered in craftsmanship from across the world.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

A collection of abandoned typographic signs from Berlin and beyond.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

Neon artworks light up this dark Edinburgh tunnel.

Paris' linguistic guide to the international language of, yes, love.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

A surrealist timepiece by the artist of melting clocks.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Cold war icon and onetime "hole" in the iron curtain.

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

This collection of Neolithic monuments make up one of The U.K.'s richest archeological landscapes.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Puzzles within puzzles hide a golden treasure in this hedge maze.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.