Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

An important pilgrimage site for pagans and early Christians, named for a Celtic goddess-turned-saint.

Petrified footprints of one of the very first vertebrates to walk on land.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

A moody and picturesque riverside ruin overgrown with vegetation.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

The second-oldest garden cemetery in the U.S. was also a college brainstorm spot of Stephen King.

A fantastical bed and breakfast with magically unique rooms.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

These layered sandstone mountains in China look like they are made of pressed crayons.

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

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

Climb down into the largest sinkhole in Qatar.

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

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

Rare recess caves fill this unbelievably beautiful Ohio park.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This extraordinary geological oddity resembles human-made pavement.