An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

A beautiful but toxic fountain of mercury.

An eccentric home in Sicily turns heads on a regular basis.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A cave's rare beauty held a cavernous secret hidden underground.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The largest portal tomb in Europe has a capstone weighing around 150 tons.

Tucked in the back of this amazing antique store is an important piece of medical history.

The notorious headquarters of a corrupt political machine.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

One of only two commuter aerial tramways in the United States.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A semi-scholarly approach to sex.

One man's personal kunstkammer, museum and shop.

The patron saint of spinsters grasps a container of dried blood.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

"Mock all and sundry things, but leave the saints alone."

This Boston medical museum features the skull of the famous medical case of Phineas Gage.