A plaque bearing the names of those who dedicated themselves to protecting Budapest's Jewish population during World War II.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A relic of World War I that now exist as a piece of public art.

A Jenga-style cylindrical tower of books that appears to go on forever.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

A giant interactive periodic table with real samples of the elements.