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

The Uros people live on floating reed islands in lake Titicaca.

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.

Guatemalan womanizer, venerated during Holy Week.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

Pigduck of Turku.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

To avoid the demolition costs this abandoned drawbridge was simply left in the up position.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

This lighthouse was witness to the end of WWII hostilities and now collects creepy cairns.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Mysterious stone tower featured in many alternative histories of the New World.

Oldest synagogue in the United States.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

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

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.