A giant donut stands as a popular symbol of Los Angeles iconography.

The final resting place of the poets Shelley and Keats.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The "lovely red Vega" of the legendary record-settling pilot.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Washington's iconic carousel has a nice piece of Civil Rights history.

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.

An overlooked memorial honoring the local Washington residents who died in World War I.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

These unusual rooms on wheels are holdovers from the 1960s.

This pun was simply waiting to come to life, and one defense contractor made it so.

One of the ghostly stops along Route 66.

The ghost town that ended up on Ebay.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

A clear blue swimming hole with hidden caves, still unexplored.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

See massive fossils that are over 200 million years old in northeastern Arizona.

Inside this clubhouse is a cinephile's paradise.