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

These eerie outliers of the lightning bug family glow a mysterious blue color.

This woodland architectural installation acts as a camera obscura for the heavens.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

Hidden deep in a forest is this geological wonder carved by glaciers.

Finnish lake, and scene of an infamous murder mystery.

Crawling into this primordial cave may feel disconcertingly familiar.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

This stunning mountain lake was named for a pair of tragic lovers whose statues stand at the center.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

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

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Walk through Czech history in Prague's largest graveyard.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.