This landmark cemetery in Boston was created more than 300 years ago.

Narrowest house in Boston.

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

This parking garage was the site of what was - at the time - the largest cash robbery in history.

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

This memorial honors those who served on Gallops Island Radio Training Station during the second World War.

Dedicated to nine marines from Massachusetts who perished during the Beirut bombings.

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

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 anonymous art project beneath Longfellow Bridge where hundreds of trophies line the steel support beams.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The farm where one of America's most famous folk artists created her paintings.

This historic church with a connection to "Uncle Sam" is now a fraternity house.

This stained glass window designed by Tiffany Studios is hidden behind the circulation desk of a public library.

This relic of 19th-century infrastructure is one of the few remaining coal gas storage tanks in the U.S.

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A plaque on the base of this statue holds a bewitching design.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

More than 200 unconventional musical instruments that anyone can play.

Resonating tubes make music from highway overpass.