The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

The attic of a four-century-old canal house hides a clandestine church.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Amsterdam's former hotspot for public executions and dissections.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

The tallest mountain in mainland Netherlands isn't actually very tall.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

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

Visitors to this Belgium graveyard are greeted by the grieving stone parents of the young men lost to war.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

The last Oostende trawler to fish off Iceland is now a museum.

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

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

Also known as Napoleon's Canal, this waterway was created on the orders of the general, and construction was interrupted by Waterloo.

Hiding the longest subterranean river known in the world.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A visionary precursor to the Internet made of index cards.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

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

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

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

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