The watery grave of an impractical idea.

The famous Beatle secretly visited this Illinois town several times to visit his sister.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

This Birnam-based garden honors the legacy of 19th-century children’s book author Beatrix Potter.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

Largest lake in Great Britain measured by surface area.

These fantastically named natural pools look like something out of a Scottish myth.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

A proud bronze billy stands as an eternal symbol of Ireland's oldest festival, where a goat is made king.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A bit of retro transportation flair preserved in the world's largest department store.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

This black shoreline is made up of exploded lava particles.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.