America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The unusual patterns in this rock formation result from two distinct modes of weathering.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

It houses the remains of a 17th-century version of the Titanic.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Northern Ireland's Brobdingnagian stepping stones.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The Liverpool street made famous by the Beatles is real.

The quiet field that inspired one of the most famous songs of all time.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

A small island dotted with old, historic Finnish buildings.

An abstract monument to a symphonic composer.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A subterranean house of worship carved right out of the bedrock.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The park that the Chicago Stockyards built.

One of the most powerful computers in the world can be visited by anyone who wants to experience more computing than they can handle.

The oldest experimental corn field in America is still creating better ways to grow crops.

Fragments of a massive unfinished sculpture sit near the main quad of the University of Illinois.