The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Pompeii's less famous neighbor is still revealing her secrets.

An unusual round church in London with a Templar past.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Olfactory delights in San Francisco's Botanical Gardens.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

A dilapidated dock tells the story of Titanic's missed arrival.

A heavenly experience, right here on Terra Firma.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A beautiful geyser under environmental threat.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Home to items never before seen by the public.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.