This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Museum dedicated to the terror regimes of Hungary.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

A black cat protests the City Guild in Riga's Old Town.

Eyam took steps to quarantine themselves and keep the plague from spreading.

One part local history, 99 parts gruesome haunted house.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This attraction was abandoned after the Chernobyl disaster.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Famously misunderstood wonder of the ancient world

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Gargantuan home of Russian science.

World's largest bell sits on the grounds of the Kremlin in Moscow.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

This giant roadside goose has been hailing travelers into a small Ontario town for over 50 years.

This unusual structure may be on its way to becoming a cultural landmark in Toronto.