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

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Medical history with an amazing, if frighting, collection of wax diseases on display.

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

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

Lavish royal estate punctuated with heated greenhouses.

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

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Amsterdam's Red Light District leaves little to the imagination.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

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

This unattributed sculpture in Amsterdam is hiding in plain sight.

The history and future of cannabis.

A floating cat sanctuary on an Amsterdam canal.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Cat art as far as the eye can see.

Museum preserving torture methods from the past.

The world's only museum devoted to the wonders of fluorescence.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

European castle ruins in an American state park are actually the product of death and grief.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

Only museum dedicated to women pilots, with personal artifacts from Amelia Earhart and other aviatrixes.