Just a man taking his prehistoric pet for a stroll.

Part of a secret 1970s nuclear defense program is now open to the public.

A true roadside icon standing on the same plains that the herds once roamed.

One of the best examples of Art Deco architecture in the United States.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A huge musical instrument played by the ocean.

A true treehouse near Hawai'i Volcanoes National Park.

A controversial memorial at the place where Captain Cook met his violent end.

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

A deep toxic lake fills this abandoned open-pit copper mine, now a Superfund site.

An abandoned sawmill from more than 134 years ago stands testament to the ambition of one man.

An environmental art installation inspired by farmhouses and crop circles.

After being lost for nearly a century, this historic bell finally returned home after its mysterious theft.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

An underwater city for the dead.