Silent memorial, using bone conduction to take people back to the Dresden Bombing of 1945.

A moving and macabre World War I-era painting by the great artist Otto Dix.

From morgue to urn, watch the whole process at this unusual educational attraction.

Over 12,000 hygiene oriented objects and exhibits.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

A former ironworks that was the first UNESCO industrial site.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

Deep in the limestone cliffs of the Alabaster Coast, a German fortress built during World War II.

The largest underground church in Europe.

This bike path was sunk below water level for maximum wonder.

This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.

This small commune with an even smaller name appears to have an unlikely amount of dead ancestors.

A rare example of World War I trenches from the British front.

This museum is filled with an eclectic collection of unique inventions.

A 16th-century horror show built in a lovely Italian garden.

Longest canal tunnel in the world, abandoned in the 1960s.

100-windowed castle turned art gallery, built by one dedicated mason.

15,000 year old bison sculptures.

Beneath the city of Lourdes, France is a massive, concrete church.