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

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Huge masonic hall in Philadelphia with lavishly themed rooms.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

One of only two commuter aerial tramways in the United States.

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 ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A layered tribute to the work of mosaicist Isaiah Zagar.

Elevated freight railway turned wildly successful urban park.

An enormous, inside-out glass globe built in 1935.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

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

A terrific purveyor of natural history objects and curios.

A huge musical instrument played by the ocean.

The world’s first penitentiary, meant to be humane, drove men insane.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

South Korea's largely symbolic, barely used gateway to the North.

Secret North Korean passage discovered below the world's most dangerous border.