The first museum in the world devoted to sexual gadgetry.

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

Macabre astrological automaton clock dating to the late 1400s.

The statue of a cursed knight is said to come to life every 100 years.

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

A mocking tribute to the past and modern leadership of Prague.

A beautiful window with the old Tesla Radio company logo.

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

Spitfire airplanes with butterfly wings hover over Prague’s skyline.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

A thin golden line commemorates the deadliest terrorist attack in recent German history.

Check the time in 145 countries at once with this East German relic.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

An early 20th-century bullring converted into a modern shopping center.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

A black sand beach where glacial fragments wash ashore and look like sparkling diamonds.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant