This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

An easy to overlook storefront hides some of the most authentic and regionally diverse Chinese food in New York.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

A daily replay of the experiment that proved the rotation of the Earth.

Steep canyon walls hide a forested oasis in the West Texas desert.

The end of times arrives, at least for the fish in the O.C. Fisher Reservoir.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

An original apothecary from 1792.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Created by four famous men (Henry Hobson Richardson, Frederick Law Olmsted, Calvert Vaux and Thomas Story Kirkbride), the beautifully designed Buffalo State Asylum was resurrected as a hotel and art center...but still boasts a ghost story or two!

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

Come for the sustainable organic chocolate, stay for the sustainable organic booze.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

The Grand Canyon of Texas.

Twenty churches beautifully painted by 19th-century Czech and German immigrants in Texas.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.