A famous alternative culture epicenter and where Joplin serenaded young hippies.

A hidden world of exotic succulents and cacti.

Apple memorabilia in an undisclosed warehouse, hidden for undisclosed reasons.

A humble garage, world-famous for being the epicenter of a technology revolution.

Dive bar built out of the remains of a whaling ship.

This shop specializes in oddities and Victorian-inspired wonders.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The newsstand that never closes its doors—well, almost never.

Collective dedicated to restoring steam engines.

Explore the evolution of printing technology, from cuneiform to Kindle.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The humble field where the first Major League Baseball game was played.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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.

A rare view of a preserved Victorian science museum.

The United States Capitol's former columns still stand.

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

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

This pun was simply waiting to come to life, and one defense contractor made it so.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.