The world's most active stratovolcano is almost always erupting.

"Iron Age" creatures fill this huckster's rusted metal sculpture garden.

The home of a famed utopian science fiction author has been preserved long after his predicted future in the year 2000.

Huge stone depressions which may have acted as an Incan agricultural experiment.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

A circus legend leaves an unexpected endowment.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

A mysterious castle built as a monument to lost love.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

The world's largest piece of copyrighted artwork.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Historic Hull Street was actually the first street with a proper name in the Boston area.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

Final resting place of the two women killed on a small island off the coast of New Hampshire.

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

Scene of the grisly murder of two Norwegian women in 1873.