This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

A new kind of theme park for adults off the Las Vegas Strip.

An exotic wildlife habitat right off The Strip.

Believe it or not, the now-ubiquitous California avocado originated in Guatemala.

This restored colonial house was once home to the botanist responsible for bringing avocados to the U.S.

A medieval church built up to defend its village.

An ingenious Dutch land art project uses grass ridges to cut airport noise pollution in half.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

The oldest working mechanical clock in the world.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Ancient Egyptian relief, claimed to depict an electrical light.

Light still pours into the ruins of this ancient Islamic observatory.

The world's second-largest sundial, made entirely out of stone.

Native Americans built this circle of stones, which was used to predict astronomical events.

This ancient Chinese observatory still contains early astronomy technology.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Mongolian Buddhists believe this monastery in the Gobi desert to be the center of the world's spiritual energy.

This odd museum/art gallery embraces the physiological, zoological, and ethnographic side of sex.

No Gordon Lightfoot song, only a barebones monument to greed.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.