World's tallest monolithic statue has served as a pilgrimage site since its completion in 993 CE.

Modest by day, illuminated majestically at sunset.

A blooming house of worship for the masses.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The site of Paul Revere's historic two lantern warning.

An enormous, inside-out glass globe built in 1935.

Frida Kahlo's childhood home, now a museum of her life and works.

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.

A modern day curiosity cabinet.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A massive volcanic plug is now a protected area that hosts a number of bird species.

A stellar example of Art & Crafts architecture, and a movie set to boot.

Two thousand artifacts from around the world collected by one woman who loved to travel.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

A mechanized clock where a man fights off a dragon, crab, and rooster.