One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

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

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

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

Bouncing, delightful, mechanical art at the MIT Museum.

Three prestigious academic collections come together to create a world-class natural history museum.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A castle built for love, and abandoned due to heartbreak.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

Two massive rock outcroppings on the Oregon coastline.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

A massive sea stack famous for its appearance in The Goonies.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The magic's in the hole!

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

The bears may be gone, but their old cages can still be found.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.