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.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

This historic Boston building has gone from personal estate to porn theater and back again.

One of the indelible moments of the American Revolution took place at this location.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

Solar powered Spectacle Island features all-green facilities.

The site of the tragic isolation of Nipmuc Native Americans left to perish in King Philip's War.