This rural museum highlights Wyoming's era of trapping and fur trades, and hosts the annual Green River Rendezvous in July.

Odd outsider art installations surround a Gold Rush-era ghost town.

For many years, the river that Julius Caesar led his army across into Italy was lost until re-identified.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A museum dedicated to secret surveillance.

Home to items never before seen by the public.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

The "Father of Arizona" tried to build a Zoroastrian fire temple on the hill where he's now buried.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

Indents in the pavement are all that remain from a grisly death machine in Paris.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

A museum within a museum, devoted to history's most questionable medical devices.

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

An encyclopedic collection of mammal penises.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

A registered historic landmark shrouded in unsettling local legends.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

This overlooked street light once served as a KGB dead letter box.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

One of the best-preserved medieval streets in Europe.

This North Carolina store preserves a historic moment in America's movement for racial equality.