This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

Putt your way around Australia in a black light environment.

This Viking-inspired miniature golf course features a pirate ship and views of Icelandic landscapes.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

This haunting stone chasm is a hotbed of mossy rock and English legend.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

The massive white mound and accompanying water terraces are a striking geological oddity.

The blowhole bursts spectacularly right next to the buildings in a medieval seaside town.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

These 18th century gardens tell a rocky story of the son of Odysseus.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

The view from this giant Stone Age toad is unexpectedly beautiful.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A meditative space out of a fantasy story.

A charming Spanish village sits atop this natural limestone overpass.