The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

Go inside a revolutionary, cage-less zoo where 35 species live and some of them roam free alongside their human visitors.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This mundane post marks the old location of the city's main postal hub.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

The mark of the Devil's horns on a marble column in Milan.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

The 20-mile causeway that separates the Netherlands from the sea.

This massive blockhead sculpture hides an entire library.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

Inside this art museum resides one of Glasgow's most famous musical instruments.

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

This abandoned boat was left in place thanks to its rotting beauty.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

This 16th-century house tells the city's history through old artifacts and quirky tales.