The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The oldest Buddhist monastery in Mongolia has survived centuries of invasions, political shifts, and religious purges.

Enormous statue of the Emperor of the Mongols.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A beloved tribute to the Fab Four and the freedoms they inspired.

People have been scribbling on this massive chunk of granite for more than 1,500 years.

History, geography, and shamanism meet in this eye-catching monument to the greatness of three empires.

A jagged silhouette of shamanistic stone heaps rises from the shore of this dazzling mile-high lake.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

Mile-long cave system near Great Smoky Mountains.

FDR hoped to find a cure for polio in this Georgia town's warm springs.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Enormous lake at the bottom of a unique cave system.

One person's lost luggage is another person's treasure.

A natural history museum with an extensive collection of bird dioramas.