European castle ruins in an American state park are actually the product of death and grief.

Rare recess caves fill this unbelievably beautiful Ohio park.

The seventh largest spring in the world.

Rusted and decayed, this former mining site is a portal to the past.

This abandoned Greek island was the last active leper colony in Europe.

One of the best-preserved medieval streets in Europe.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

The ancient latrines of the Greeks, in all their public glory.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

Giant marble phalluses on the sacred island of antiquity.

After traveling the world, one of the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

An Outer Banks museum devoted to the thousands of shipwrecks resting off North Carolina’s coast.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A free park where visitors can learn about and collect 440 million-year-old fossils.

A historic area for shopping and dining in Ketchikan's former red-light district.

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

The golden age of flight captured in a downtown airport.

A six-ton wedding present for the King of the Scots.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Clean, cold drinking water flows from a nondescript pipe in a roadside rock face.

A castle built by an eccentric medieval enthusiast in suburban Ohio.

A 25,000-square-foot display with dozens of model trains in intricate miniature worlds.

Less a museum than a bizarre fantasy world created by artists and engineers.