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.

Home to three historic ships from the age of Vikings.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Budapest's Communist-era statues, banished to the suburbs.

The most visited, and possibly most controversial, museum in Germany.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Looming communist pillar with a Czech twist.

Macabre astrological automaton clock dating to the late 1400s.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A massive Montreal stadium that has seen nothing but trouble since its inception.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This 1967 experiment in modular architecture was designed to be a new model for urban living.