A Korean village where times stands still.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Ecuador's largest Incan ruins show evidence of sophisticated irrigation and diplomacy among the ancient builders.

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

This museum was invented in a novel before being made real by the author.

A subterranean Holocaust refuge within one of the world's longest cave systems.

Asia's largest limestone cave is home to a world of plastic goblins and gold mining history.

A local landmark that has become a hub of graffiti and urban exploration.

What was once the base for Russia's first nature reserve is now a ghost town, right on the shore of Lake Baikal.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

A war-torn Olympic relic is being overtaken by graffiti and nature.

What once sat in the world’s spotlight is today a largely disused ghost complex.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Immortalized by artists, this church incorporates a medieval lighthouse into its shoreside structure.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

A remarkably intact castle that once was the largest in Ireland.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.