The walls of the iconic dome are hollow and have a secret stairway.

Definitely not a clown bar.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

After spending more than a century on the ocean floor, this shipwrecked column is finally resting atop solid ground.

Surprisingly delicious Asian-style hot dogs.

Little-known artist couple chose a former silk factory as the location for a museum dedicated to their work and other avant-garde art.

This charming candle shop has been in business since 1789.

Panoramic views from the mountains over a facility built to provide tuberculosis patients with fresh mountain air.

One artist's collection of homemade handicrafts doubles as a monument to 20th-century material culture.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

Ancient catacombs form the foundation for this Rococo orgy of a church.

A puppeteer’s paradise offering shows, workshops, and an archive of over 2,000 puppets.

Entering this curiosity shop is like stepping into a mad scientist's lab.

Delightful disarray of found objects and clutter.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Perhaps the most spectacular grotto along the Algarve coastline.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

Make your reservation to have coffee with some kitties.

A heavenly experience, right here on Terra Firma.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.