You can spot this teeny tiny stained-glass window from the Bonifacius bridge.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A 1:20 scale piece of the Netherlands commissioned by a queen lets visitors take a stroll as giants.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

Scale model of St. Peter's Cathedral (Rome) in the middle of a small Dutch town.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A unique seaside cave where Aleister Crowley faked his own death.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

Kentucky's longest operating jail is now a spooky spot to spend the night.

The Trappist monk, prophet-poet, and rebel never really got to live out the eremitic life he was seeking.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

This hidden jockey “walk of fame” celebrates the winning riders of the Kentucky Derby.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

A curiosity-seeker's paradise set inside a three-story historic school house.

This abandoned cemetery has a dark past of bodies buried over bodies.