These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

The dramatic upward-curving roof is one of the most iconic examples of Googie architecture that still stands today.

Malibu's first beach home features an astonishing trove of ceramic tiles.

Frank Lloyd Wright died a year before construction on his largest public project even began.

This giant geoglyph of mysterious origins is now the site of neo-pagan rituals.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Why walk on this historical site when you can zoom down instead?

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

A mysterious demonic figure peers down from its perch within the gorgeous Chester Cathedral.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

A dark Victorian well house now plays host to mystical waters and pagan shrines.

Some say this medieval church is where the poet Dante married his wife and also met the love of his life.

10,000 flowered plants bloom in the City of Roses.

The wooden airship was the largest flying boat ever built.

A medieval weapon rumored to have been used by the brilliant poet himself.

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

A remarkable medieval structure born from a 14th-century disaster.