These boots are made for selfies.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A modernist landscape of water and sci-fi concrete.

Collection of fossils, plants, and ancient animals encased in amber.

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Home to items never before seen by the public.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

A fantastic reconstruction of a 10th-century Viking longhouse.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

Iceland: home to volcanoes, waterfalls and, apparently, Santa?

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

This mountain fissure hides a secret path to a secluded mossy grotto within the rock itself.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

This modern monument to pagan belief looks like it was transported straight from ancient times.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.