This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

An abandoned town is hidden in Great Smoky Mountains National Park.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

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

This NASA test station is home to some of the world’s largest and most powerful space environment simulation facilities.

A whimsical folk art garden full of punny pieces and a diorama containing 3,500 toys.

See tools once used for processing this coffee-substitute plant before sampling its flavor firsthand.

Its collection offers a glimpse into the Russian Old Believers' centuries-old way of life.

Hundreds of unusual wheel crosses poke above the earth in this small Estonian cemetery.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

Relics from an era long gone, sit idle outside this Estonian museum.

This peculiar border irregularity is the only way to legally enter Russia without a visa.

Two well-hidden huts let animal lovers spend the night among the bears, wolves, and other predators of the forest.

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

A forest park outside Tallinn full of architectural and artistic curiosities.

This Russian diner is staffed entirely by twins.

This small museum is basically a time capsule of daily life in the Soviet Union.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

This wondrous hideaway is suspended in a bamboo forest above a sanctuary for rescued llamas and alpacas.

Nestled in an unassuming residential area, this "forbidden forest" is rumored to spirit away those who dare to enter.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

The remains of one of America's first radiation testing grounds still rest ominously in a Georgia forest.

The world's first time capsule lies behind a welded steel door in Atlanta.