One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

A vertically floating hemlock controls the waves and weather at Crater Lake.

While these wooden totems bear a striking resemblance to First Nations artwork of British Columbia, their actual origins lay on the opposite side of the Pacific Ocean.

A volcanic fissure over two miles long and up to 70 feet deep.

The illuminated falls are a gem in North Cascades National Park.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

The tale of a strong-willed woman who stood her ground when the commercial world came rumbling in.

A museum dedicated to the history and exploration of both popular music and science fiction.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

A colorful architectural gem in Seattle's uniquely modern Central Library.

Couple's personal collection of pinball machines turned public pinball museum.

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.

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

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

This frequently-photographed waterfall takes only a short hike to visit.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

An emporium for the weird, creepy, rare, and just plain gross.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

Private collection of art inspired by cabinets of curiosity.