A series of idealized caves carved to entertain guests.

The church and nearby castle are all that remains of a medieval village, mysteriously abandoned.

Once a training ground for Olympic athletes, this artificial ski slope has fallen into ruin after a fire in 2012.

An abandoned Yorkshire castle that is hidden in plain sight.

Walk through the history of a Dutch truck manufacturer, from 1928 to today.

A rare double mill nestled along the banks of the Aa river.

This giant wire frame man sculpture is crouched in contemplation.

In the Netherlands, one of the world's largest private car collections can be found.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

Survival capsules find a second life as a unique hotel.

A grassy pyramid named after a French battle.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

This residence straddles a border between Belgium and the Netherlands.

Abandoned since 1998, this train station has become an oasis for urban explorers.