Living towers made of people that are now recognized by UNESCO.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

A beautiful but toxic fountain of mercury.

Long tunnels run under the ancient chariot racing circuit to the tower.

Stunning Roman aqueduct used for 1900 years and still standing.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This memorial, built by fascist dictator General Franco in 1960, has been repurposed by the people of Catalonia.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

A beautiful bamboo trail tucked in this famous Japanese Shrine.

The quintessential Japanese rock garden has existed for more than 500 years.

The 10,000 Torii shrine.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

In this Borneo cave, it's not the thousands of bats you need to worry about, it's the blankets of roaches.

Malaysia's floating mosque.