Roman ruins top white travertine terraces formed by ancient hot springs.

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

Walk in the footsteps of the gods and straddle two tectonic plates.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A massive underwater sinkhole made famous by Jacques Cousteau.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

The longest hedge maze in the world.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

The steepest classic funicular in the world glides along a dizzying incline.

Stretching almost 2,000 feet, this painting is one of the longest pieces of Buddhist artwork in the world.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Tubing through a cave lit with glowworms is a magical underground experience.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

A serpentine highway twists and turns over the treacherous Norwegian Sea.