This groundbreaking 16th-century map is known as "America's birth certificate."

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

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

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

The study has wall paneling from a 17th century ship.

The helicopter that "Tricky Dick" absconded from the White House in on his last day in office.

See where Bill Murray kidnapped a hapless Punxsutawney Phil.

The location where the American Revolution ended.

Hiding in plane sight.

Hawai'i's oldest wooden house was shipped around Cape Horn from Boston in 1820.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

An ode to one of the first concerts broadcast via satellite.

A small cemetery chapel designed by Frank Lloyd Wright and built in 1906.

A unique collection of Western and Japanese-style graves.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

This monument owes its name to a quote by the famous civil rights activist and journalist.

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

This lakefront cottage was crafted in the 1800s and was once a sanitorium.

Legend says Dungeons and Dragons players can get their dice blessed at the creator of the game's memorial.