Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

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

The final resting place of the world's first nuclear reactor.

Destructive children, start your engines.

This shop for all your super spy needs hides an educational secret.

Curios, scientific antiques, oddities for sale.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

The clock that sets them all.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

One of the largest public collection of historic armored and military vehicles in North America.

The world's oldest continuously operating airport was founded by the Wright Brothers.

A monument to the center of the North American continent may be off by a few miles.

The center of the only hemisphere that awards visitors with a commemorative coin.

Trace the history of writing at this unusual North Carolina destination.

Exact replica of the ancient monument, but much, much lighter.

Medical and zoological curiosities for sale.

Where the line between entertainment and aerospace blurs.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

The resting place of a Civil War celebrity's amputated limb.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.