A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

During the holidays, a vintage subway train whisks New Yorkers back in time.

An artist's cute bronze subway sculptures belie his violent artistic past.

Lie in a hammock where George Washington stood.

A popular European tradition makes its way to the states on one of America's most famous bridges.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

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

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Elevated freight railway turned wildly successful urban park.

A terrific purveyor of natural history objects and curios.

A crumbling hospital from the 1850s on Roosevelt Island.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

Concrete strongholds stand guard over the Golden Gate.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

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

Golden Gate Park's historic collection of plants.

Over 315,000 preserved amphibians and reptiles in jars.

The restored and active Victorian-era final resting place of San Francisco.