Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

A marvel of Byzantine engineering under the streets of Istanbul.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

What once sat in the world’s spotlight is today a largely disused ghost complex.

A museum marks and documents the site of the Titanic's launch.

Northern Ireland's Brobdingnagian stepping stones.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Collection dedicated to brands, packaging and advertising.

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.

This collection honors the iconic, and proudly American lighter that just won't quit.

America's post-nuclear-attack chambers of Congress.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

This small exhibition displays equipment and artifacts once belonging to the feared Stasi secret police.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Christ's blood preserved in a Belgian town.

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

A former ironworks that was the first UNESCO industrial site.

The prototype for all Nazi concentration camps.

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

Museum celebrating the achievements of the Soviet space program.