A medieval gate once used as a prison and how home to a city museum.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.

Lavish royal estate punctuated with heated greenhouses.

Intricate metal sculpture that's half gothic cathedral, half construction equipment.

Cozy basement bar sports an inventory of over 2,000 beers.

Six turbines towering over a wide road for passersby.

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

The struggle of a small Dutch island against the sea.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Colorful and chaotic stacked hotel in North Holland.

The heart of Dutch football history.

This ghost town in Belgium will lose its street art when it ceases to exist.

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

The largest 19th century panorama in the world still in-situ.

A miniature city, once ruled by the Queen of the Netherlands.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

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

A large measuring stick marks the lowest point of a country that is partially under sea level.

You may get stranded and everyone's peeing in the water, but at least there's cocktails!