The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

Is this 47.7-mile stretch of highway the longest straight road in the United States?

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

Right next to departures—how convenient!

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A replica of the flagpole that gave a frontier town its name.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

This grand gothic brewery has been pumping out suds for over a hundred years.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The most decorated dog of World War I is preserved in the Smithsonian.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

Home to items never before seen by the public.

A computer bug so primitive it was an actual insect.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The most accurate timepiece in the world.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.