There aren't too many operational funiculars around, but Pittsburgh has two!

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

The arching stretch of London's longest street holds many reminders of the area's maritime past.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

A subterranean house of worship carved right out of the bedrock.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

In Oklahoma City's Bricktown, there's a street that don't use jelly.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

The largest single-building tribal cultural center in the U.S. is an expansive museum in Oklahoma City.

The surprising home of the iconic Santa Monica Pier Ferris Wheel.

Houses are tucked between, on, and underneath giant boulders.

A massive tribute to Estonian history and culture.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

A museum dedicated to one of Portugal's most celebrated writers.

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

This museum contains a vast array of puppets and marionettes from all over the world, featuring incredible works by Portuguese creators.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This charming candle shop has been in business since 1789.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.