An intricately carved Viking church overlooks a glistening fjord.

This remote fort on the Yukon River is a vestige of the wild Alaska gold rush.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

A historic coal mine that doubles as a museum and tourist attraction.

Home of a 28-foot tall stalagmite known as the War Club.

This abandoned amusement park was built on a site with a dark history.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

This black shoreline is made up of exploded lava particles.

A tunnel of hardened lava along Maui’s famous Road to Hana.

This unusual lava tube spouts seawater during high surf.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

This blowhole is supposedly caused by a trapped monster.

Submerged lava formations create incredible waterworks.

This legendary urban waterfall creates a dazzling display of rainbows.

A true treehouse near Hawai'i Volcanoes National Park.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.