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

A fortified city, home to a remaining population of five families

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

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

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

Ruins of a German Castle on top of a towering stone pillar.

The most alien-looking place on Earth.

This "floating island" plateau sits 7,671 feet above the forest floor.

An ancient stone fortress considered by many to be the eighth wonder of the world.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

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

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The stately remains of Llywelyn the Great's mighty fortress.

Bohemian paradise covered in majestic forests.

Hot springs monkey spa in the middle of Hell's Valley.

Sacred Buddhist home of some spiritual monkeys.

An unexpected desert oasis in South America.

This red lake 4,000 meters above sea level is home to rare flamingos.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Moss and stone turn this waterfall into an otherworldly liquid veil.

Most-visited and most-photographed slot canyon in the American Southwest.

An exquisite tunnel of cascading flowers.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.