A sulfuric hellscape in southern Italy.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

This winding road through an Italian canyon may be the most scenic drive in the world.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The glowing blue Nymphaeum of Emperor Tiberius.

Stalactites and stalagmites in a beautifully lit cave.

An unusual sand beach in the middle of a forest.

A precariously balanced goose-shaped boulder with a dark legend.

Exquisite examples prehistoric bas-relief carvings.

If they push on just the right spot, even the weakest person can move this titanic boulder.

A tiled, multi-level garden of survival in Lyon.

A chapel on a volcanic core, marking the end of a successful journey.

Sleep in a climate-controlled plastic bubble for the night.

An icy lake tucked among jaw-dropping alpine panoramas.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

Ancient paintings known as the "Sistine Chapel of Cave Art."

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

Quality time with reindeer in the stunning scenery of their natural Lappish habitat above the Arctic Circle.

Crawling into this primordial cave may feel disconcertingly familiar.