An art collective teaching the more fiery, metal-y art forms.

A gathering of green robots at the Googleplex.

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

The model behind the iconic 3D test model.

This nostalgic blast from the grooming past is also a working barbershop.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

An eerie diorama that captures the majestic nature of a few prehistoric-looking beasts.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

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

A garment factory hides a small Dominican eatery in the hallway to its freight elevator.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

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

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

The timepiece that exonerated a labor radical accused of a parade bombing that killed ten people.

The first museum in the United States dedicated entirely to posters.

Nikola Tesla's former home contains an homage hidden from plain sight.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

Designed to commemorate the founding of the first settlement in Delaware.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

New York's oldest and possibly grandest keeper of books.

The lesser-known Alice sculpture of Central Park dedicated to the “godmother of American children.”

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