The Columbia Road Flower Market is now open every Sunday, rain or shine.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The video game-themed street art first popped up in the French city.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

The final resting place of the "father of special effects."

Christ's blood preserved in a Belgian town.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

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

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

A lively circle of dancers in the Georgian capital commemorates an ancient rite of spring.

You'll find just about anything in this funky Tbilisi flea market.

Men and special assistants stand by the road to sell the day's catch in this lakeside village.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.