Concrete strongholds stand guard over the Golden Gate.

Washington's iconic carousel has a nice piece of Civil Rights history.

Lie in a hammock where George Washington stood.

Look closely and you’ll notice that the color changes a third of the way up the tower.

New York's southernmost subway station is whimsically wavy.

Breathtaking and huge 430 year old maps of Italy.

An artist's cute bronze subway sculptures belie his violent artistic past.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

The blinking light atop the iconic landmark has been sending secret messages for decades.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Got apples?

Noirish green neon marks the location of one of the oldest private detective agencies in France.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

The oldest stone house in Paris was built by its most famous alchemist.

Notorious artist squat renovated into legal studios.

This bridge was constructed from the rubble of the infamous Bastille.

The celebrated eyesore created by starry-eyed sweethearts.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.