One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Seven people are buried in the middle of what's now a movie theater parking lot.

The painted and decorated towers of this Hindu shrine were once the tallest structures in one of the oldest cities in India.

Astronomers plan to launch a space telescope into orbit, to find out what exactly stands in the way of an asteroid hitting Earth.

A unique market that brings together various goods and cultures.

This airfield played a key role in both World War II and the Cold War.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

A huge musical instrument played by the ocean.

A psychedelic labyrinth on the San Francisco bay.

A tribute to the artist and activist who created the rainbow pride flag.

Worker-owned cooperative and resource for those looking to lighten their ecological footprint.

A hands-on traveling collection of the innovative devices of yesteryear.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This lavish room in a New York City mansion is a rare relic from the end of the Gilded Age.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

In the 19th century, this canal provided power to mills, machine shops, and other businesses in the area.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

Home to items never before seen by the public.

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

This morbid scene depicts the Darwinian drama of death on the African savannah.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

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