Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Spanish religion mixed with local architecture has yielded a network of churches unlike any other.

This historic Chilean cemetery is the burial place of hundreds of European and American freethinkers and non-Catholics.

The ruins of a pre-Columbian fortress city so secure it held off the Spanish conquistadors for over 20 years.

This enchanting rainforest hotel looks as though it grew from the forest itself.

One of Chile's most active volcanoes is riddled with beautiful caves.

What was once a unique system of urban elevators is turning into a mechanical ruin.

A record-breaking pool that uses computers to turn ocean water into cleaner, private swimming water.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.

A fantastical and futuristic temple of light built from nine monumental glass veils.

Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

It's just another skyscraper, but it's shaped like '90s cell phone.