An abandoned warehouse turned art sanctuary in New Orleans.

This quaint museum in a long-running workshop is dedicated to a fixture in New Orleans lighting.

Colorful, cheeky signs spill out of legendary New Orleans folk artist Dr. Bob's Bywater studio warning you to "Be Nice—Or Leave."

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This New Orleans statue of a portly figure in a goofy hat pays homage to a classic of satirical literature.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

The "Prussian Versailles" that is as glorious today as when it was built.

Once a path for Jewish funeral processions, this unassuming alleyway is rich in local lore.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

The attic of a four-century-old canal house hides a clandestine church.

Cat art as far as the eye can see.

Amsterdam's former hotspot for public executions and dissections.

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.

This monumental work of art symbolizes the coming together of a previously divided city.

Cold war icon and onetime "hole" in the iron curtain.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

A line number in Amsterdam that will likely never be used again due to its tragic history.

This historic Amsterdam bar used to accept sailor's monkeys as payment.