This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

This impressive tunnel was dug entirely by hand over the course of 36 years.

This ramshackle ghost town is comprised of mining-era buildings collected from around the region.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

The 25-million-year-old cavities have perplexed people for decades.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

The fairy tale castle of the "fairy-tale king."

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

This elaborate stone bridge over the Neisse river has sat in pieces since 1945.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A reimagined 19th-century Acadian village featuring authentic Cajun-style homes filled with artifacts specific to the period.

The world’s tallest outdoor lift stretches along the stone pillars that inspired the floating mountains in the movie “Avatar.”

After the nearby mercury mine shut down, this town was abandoned and declared a Superfund site.

A miniature beach in the middle of the desert.

The other side is actually green.

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

An exceptional assortment of fossils recovered from private collections.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

Get tall with nature's lankiest beasts and their warthog friends at this Kenyan preserve.