An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

This museum explores the grim reality of life in the earliest British colonies in America.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

A museum dedicated exclusively to aircraft used in the military.

One tiny triangular park commemorates the victims of a yellow fever epidemic—many of whom are buried right below the grass.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

This old-fashioned carhop restaurant gave the world the waffle cone.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

A nondescript Seattle restaurant inherited a piece of European history.

A sliver of nostalgia in Seattle's Viretta Park.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.