This mine is home to the largest man-made hole in Europe.

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

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

The history of sea-faring refuse and disaster is on cramped display in this Netherlands folk museum.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

Watch the local Netherlands birds from inside this giant eco-egg.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

Building Men of War and Indiamen from Holland's Golden Age.

This giant wire frame man sculpture is crouched in contemplation.

While most bridges allow roads to pass over water, this one allows water to pass over a road.

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

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Massive galleon from a box-office bomb docked in Genoa.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

This memorial museum chronicles the apocalyptic destruction of the First World War.

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

This abandoned Belgian fortress is purposefully being left to nature.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

For the holidays, the tallest broadcasting tower in the Netherlands turns into one of the world's tallest Christmas trees.

An ancient Egyptian temple sits within a modern European museum.

This early 19th-century graveyard is the final resting place of Vincent van Gogh's mother.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.