This huge pile of volcanic boulders hides a stunning network of secret grottoes.

This road winds through the steep coastal cliffside offering spectacular views for those who brave the drive.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

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.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

This demon atop the Notre-Dame de Paris looks utterly bored.

The celebrated eyesore created by starry-eyed sweethearts.

This bridge was constructed from the rubble of the infamous Bastille.

Only hotel where you can legally launder money.

A man-made island in scenic San Francisco Bay.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

San Francisco's newly reopened hands-on science museum.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.