This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

The self-proclaimed world's smallest museum, located next to a Massachusetts sandwich chain.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A derelict bit of transportation infrastructure hidden in the woods.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Go inside to really appreciate this 500-year-old technological masterpiece.

Secret refuge and museum of the Duke of Florence.

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

The middle finger of modernity.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

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

The world's largest piece of copyrighted artwork.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

Beautiful steampunk ghosts of early Massachusetts.