The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

Last church of this militaristic WWII style.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.

A school used as a model for public education across the country.

The infamous Boston Mob ran rackets from an office here in the 1970s.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This supermarket is suspended 25 feet above an interstate highway.

A freighter full of exotic animals ends a harrowing voyage impaled on uncharted rocks in the Boston Harbor.

These ancient sacred grounds granted amnesty to those who managed to reach them.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

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

This unreal Portuguese palace looks as though it's made from a pile of different castles.

The massive machine creates cracking displays of indoor lightning.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The world's oldest bookshop still in operation.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.