The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

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

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

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

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

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

This 12-foot-tall T-rex is the largest K’Nex skeleton sculpture in the world.

Once one of the largest producers of pig iron in the world.

After just one epic test blast, this literal loose cannon proved too explosive for combat.

A statue honoring 44 continuous years of greeting passing ships.

The picturesque southern city served as the zombie-filled town of Woodbury in 'The Walking Dead.'

This mysterious twin turboprop Grumman G-159 covered in graffiti has spent a decade and a half abandoned.

This ever-changing arrangement of naked dolls even caught the attention of "The Walking Dead" crew.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

A colorful square marks the heart of the city's LGBTQ community.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

A white oak with property rights.

An underground magnet for ever-changing street art.

This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

An eerie site of reverence for those who have completed an epic journey.