"A hideous albatross in the Hudson River Valley."

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.

A botanical garden full of thought-provoking contemporary sculptures.

An enchanting work of outsider art, full of whimsical sculptures and carvings.

A stunning garden filled with fantastical environmental folk art and sculptures.

This once-private estate is now a dreamy, meditative garden that's open to the public.

Huge hole looks down onto an underground beach populated with sea lions.

Extraordinary sculpture garden created by an eccentric English poet.

These azure waters were thought to lead to the Mayan Underworld.

Frida Kahlo's childhood home, now a museum of her life and works.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

An indigenous take on European design creates a stunning visual overload.

The idyllic colonial home of the artist behind the famous portraits of George Washington and Thomas Jefferson.

These strikingly colorful paintings were created by a mysterious Mesoamerican civilization.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

A tiny island is connected to the mainland by a private railway that residents travel in their own personal wagons.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

A walkable map of the world, made from soil and stone by one man.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

This Danish castle is supposedly haunted by a woman too independent to not be a witch.

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

These particularly resplendent rodents are the state animal of Maharashtra.