The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

The stately remains of Llywelyn the Great's mighty fortress.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

A monument to the art of slicing people open.

Conifers from the Jurassic Period transformed into stone in Patagonia.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

The largest catacomb system in the world.

A castle perched precariously over the Crimean Sea.

In the land of the Light Brigade stands a testament to the Cold War.

Rare signs of the former Soviet Union in the Caribbean, though not where you'd expect them.

This giant Cold War satellite dish has become a symbol of Trinidad's need for sovereignty.

This Romanian village may have been drowned, but it is long from forgotten.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Silent memorial, using bone conduction to take people back to the Dresden Bombing of 1945.

An exquisite panometer representing Dresden as it was from 1695 to 1760.

The secret city built by the Manhattan Project.

Three bridges straddle a stream, one stacked upon the other.