Orthodox church partially financed by Tsar Nicolas II.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A wax effigy of St. Valentine hides one of the saint's relics.

Abandoned bridge hidden deep in the San Gabriel Mountains.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

This water tower has been a staple of the Rochester skyline since 1931.

A ruined Maya city that suffered a years-long case of mistaken identity.

A taste of Middle Earth, in the middle of the Bayou City.

Small-town museum dedicated to outer space ... and bicycles.

Home of the International Space Hall of Fame.

A tree grown from astronaut seeds which were exposed to cosmic rays.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

When this test site was abandoned, they didn't even bother to take the rocket with them.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

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

A detached cement mixer has been transformed to resemble a relic from some obscure NASA mission to Oklahoma.

The 92-foot-tall structure is based on the aircraft that carried the first Americans into space.

This memorial to the Mercury Seven astronaut stands at the site of his former elementary school.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.