Massive volcano in the Andes is the farthest point from earth's center.

This sign designates the road that leads to the infamous Area 51.

Mysterious meeting place for UFO hunters near Area 51.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Geothermal waterfalls in Tuscany.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Ancient snack bar of the Roman Empire re-opened.

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

Erotic art covers the walls of the largest ancient pleasure palace.

Pompeii's less famous neighbor is still revealing her secrets.

This network of roads is one of the most unique Etruscan creations ever discovered.

Water and windows define this defensive Italian well.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Thousands of well-dressed mummies below a monastery.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

Elvis's own personal tropical hideaway.