This series of Armenian caves held the oldest brain, shoe, and winery in the world.

Jesus' footprints and the first catacombs in the world.

The celebrated eyesore created by starry-eyed sweethearts.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

A misnamed well, with a deep dark past.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

A gigantic collection of teeny, tiny books.

Unusual building appears to be haphazardly built from randomly piled bricks.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A local prank turned town icon.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

One of only two commuter aerial tramways in the United States.

Read a book next to a Midtown waterfall.

Elevated freight railway turned wildly successful urban park.

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

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

One of the world's largest collections of pharmaceutical artifacts.

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

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

Macabre astrological automaton clock dating to the late 1400s.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.