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

A tiny town in an empty lot was the work of a local eight-year-old.

Tucked away on Somerville Avenue is a curated mycological gallery.

"A hideous albatross in the Hudson River Valley."

A century-old factory reborn as an artist-run live-work building.

Earliest version of the American flag can be seen atop the hill where it first flew.

This replica of a historic fishing shack long dubbed the most painted building in America.

This historic house was the birthplace and childhood home of the 35th president of the United States.

This sculpture dedicated to a pioneering labor unionist and civil rights activist is located inside a busy Boston train station.

A giant sculpture head with an optical illusion dedicated to the longtime conductor of the Boston Pops.

A pair of antique trolleys are on display at one of the oldest subway stations in the United States.

This historic sculpture from the 16th century is even older than the city of Boston.

This mosaic commemorates the oldest subway tunnel and station in the United States.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

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

An Inca spa, military outpost or maybe… both?

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

Death rituals and sacrifice inside a Peruvian megalith.

A Christian monastery stands on what was once a holy Incan temple.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

A giant open-air sculpture made of over 200 full-sized boats.

These markers are used to determine the ground stability of the Strip.