These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

The ruins of the castle that chemicals built.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

A Masterpiece with a Tragic History.

Colorado Boulevard’s historic bookstore, operating since the bustling city of Pasadena was merely some orange groves and a few ostrich farms.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A sweet symbol marks the place where torturous executions were once carried out.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This small museum in a 17th-century building honors three iconic Scottish writers.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

A museum dedicated to the alleged Roswell Incident.

Former self-sufficient mental institution now a planned community.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

A Bibliophile's Dream.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Sniff the Titan Arum's rotting flesh.

Ride the subways of yesteryear.

One kilometer of thick brass rod laid out before your eyes.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.