This Maine bridge may be the last wire-supported bridge of its type in the world.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

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

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The most accurate timepiece in the world.

A clumsy-looking flying locomotive rusts within sight of a busy rail station.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

The medieval-looking hammer beam teak roof may be a Victorian vanity, but it's still absolutely magnificent.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

The largest of only eight working transporter bridges left in the world.

One of these two land speed record-breaking vehicles went so fast it shattered the sound barrier.

The embalmed remains of the communist leader lie within a custom crystal coffin.

The only medieval bridge in Britain with its defensive tower still in tact.

The 43-mile route crosses through six islands with gorgeous views of the Seto Inland Sea.

A brightly colored natural bridge formed by mineral-rich hot springs high up in the Andes.

Where NASA's satellites and rovers phone home.

An icon among Florida's pre-Disney tourist attractions.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

The biggest solar telescope in the world helps reveal the secrets of our sun.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.