A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

America's oldest Italian restaurant is a San Francisco institution.

One of few lasting examples of the brief octagon craze that developed into folly.

Early prototype for Frank Lloyd Wright's Guggenheim.

This turn of the century masterpiece has a mysterious goaty interloper.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

This private residence was the template for one of the most beloved television homes of all time.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

San Francisco's newly reopened hands-on science museum.

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

Tiki luxury on Nob Hill.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

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

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

Built in 1945, this historic train station has a new lease on life with its baggage area serving as an event space.

These five Art Deco homes were meant to solve the "small house problem."

Using a massive antenna made up of five miles of wire, two scientists tuned into organic radio waves from the planet Jupiter.

Hidden within an idyllic suburban garden is a memorial dedicated to the victims of a terrifying spree of killings committed on U.S. soil.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

The smallest covered bridge in Maryland.

This hidden treasure provides a charming access point along the south side of Baker Park.