Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A beautiful but toxic fountain of mercury.

This semi-secret storybook hedge maze is also the oldest garden in the city.

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.

This great stone guardian of the forest is a relic from the land's volatile volcanic past.

One of Western Africa's oldest mosques, this Timbuktu icon has stood for nearly 700 years.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

The coffin-shaped church was once home to monks who slept in coffins.

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

Every year, the colorful murals of Montreal get a complete makeover.

Seven beautiful 1,000-year-old rock-cut Buddhist statues.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

The runoff from these fiery cliffs sends red water flowing into the sea.

Thousands of acres of beautiful wild landscape in the Great Basin.

This site is both a remarkable reminder of the town's mining history and a fantastic government blooper.

More than 100 Hindu temples are slowly being swallowed by the forest.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

The singular ruins of a mysterious lost city.

Mysterious Incan ruins on a tiny island in Lake Titicaca.