The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A winding path built in secret on the edge of the continent.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This North Carolina store preserves a historic moment in America's movement for racial equality.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

This woodland architectural installation acts as a camera obscura for the heavens.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

An abandoned warehouse turned art sanctuary in New Orleans.

A snapshot of the city's fascinating voodoo culture.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The oldest surviving botanic garden in the United States.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

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.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

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

Yo, Adrian!

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