This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

Ming Dynasty necropolis raided during the Cultural Revolution.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The house where John Wilkes Booth conspired with his co-conspirators.

The "lovely red Vega" of the legendary record-settling pilot.

This attraction is part anthropological journey and part amusement park.

A modest reminder of treacherous waters at the Golden Gate.

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

A 300-ship graveyard, with a few still visible at low tide.

An abandoned convention space that has been left to the homeless and the radical.

Megachurch turned Catholic church comprised of 10,000 glass panes.

Thousands of turbines whir at at the origin of North American wind power.

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

A vast city of the dead, where the deceased outnumber the living by more than a million.

Olfactory delights in San Francisco's Botanical Gardens.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Only hotel where you can legally launder money.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.