The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

The final resting place of the great navigator, or maybe his brother.

A 16th-century Andalusian palace.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The world's largest wooden structure.

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

This restaurant's marvelous musical machines include a self-playing violin.

A huge musical instrument played by the ocean.

This 19th-century church is now a popular roller rink.

The only theatre in the world constructed specifically for sound movement.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

This redwood is a historic landmark, a town’s namesake, and the dancing sideline symbol of Stanford University.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A living archive of urban activism and space reclaimed.

Welcome to the home of the world's largest typewriter company.

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