This elaborate towering structure was once famed for its revolutionary height.

The first American department store, and home to the largest operating musical instrument in the world.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

World's first "penitentiary," meant to be humane, drove men insane.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

Iconic red and white plaques show the creative names invented to navigate the city streets.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

A student driver's nightmare.

This home on a quiet suburban street is completely covered with vibrant mosaics.

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

A network of concealed passageways lies within a busy London Underground station.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A boardwalk winds through this sliver of coastal nature hidden within Sydney.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

Rainbow-hued in the summer and crystalline in the winter, this salty lake has inspired battles, temples, and plenty of awe.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

This hidden green space is the city's second largest conservatory.

This 1920s Dutch barge is now a floating bookstore.