Two thousand artifacts from around the world collected by one woman who loved to travel.

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

An enormous, inside-out glass globe built in 1935.

Once a private collection, now the only museum of arms and armor in the Western Hemisphere - CLOSED.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Memorial to a beloved puppeteer as well as all street performers.

Three prestigious academic collections come together to create a world-class natural history museum.

Impossibly life-like natural history models created out of glass by a father and son.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

Homemade rockets, dinosaurs, and robots make this New York small business much more than a furniture store.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A once grand hotel is being retaken by the wilderness it once capitalized on.

Friction between grains of sand cause a curious "singing" sound.

An eccentric inventor's castle home with its own indoor weather system.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

Once the home of a hermetic monk, this cave now houses a small church.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.