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.

Second largest wastewater treatment plant in the country.

Ornate and macabre headstone in one of the country's oldest cemeteries.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

This Canadian island is a veritable garden of decay with countless abandoned structures dotting the landscape.

A morbid piece of memorabilia from the most famous shipwreck in current history is just one of the many poignant artifacts in this Canadian museum's collection.

This impressive Boston holy house is the American mecca for Christian scientists.

This black shoreline is made up of exploded lava particles.