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

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

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

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

This beautiful architectural gem was the first waste treatment facility in Boston.

The world's largest piece of copyrighted artwork.

Dedicated to one of the darkest moments in Irish history, this memorial has faced its fair share of backlash.

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

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

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Where a brain, a beauty, a jock, a rebel, and a recluse met one Saturday and changed their lives forever.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

Partially submerged Buddha heads freckle Chicago’s neighborhoods.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.