Apartment complexes built into huge repurposed natural gas tanks.

Baroque celebration of the end of the Great Plague of Vienna.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

"We Seceded Where Others Failed."

Rock face that shares a name with Mary Shelley's famous doctor.

One of the oldest carousels in the United States is still running in the coastal village of Watch Hill.

A lighthouse on a diminutive island was one of the first of its kind to guide seamen home.

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

A daybeacon pyramid is about all that's left of this island that is said to have sunk due to a pirate's curse.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

This candy-colored storybook village originated as a 19th-century Methodist campground.

These whimsical works of art tell the story of the city's past and present.

Millions of numbers carved in glass represent the tattoos forced upon victims.

The oldest platform carousel built in the United States continues to delight children in Martha’s Vineyard.

Dedicated to one of the darkest moments in Irish history.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

A showcase of geologic history is home to one of the largest collection of lunar meteorites on Earth.

The "Seinfeld" diner.

This nearly invisible wire transforms much of the city into one big, symbolic home on the holy day.

A stunning medieval castle owned and restored by the famed actor Jeremy Irons.