When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

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

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

This Old West prison built into the side of a cliff was said to be inescapable.

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

These free-roaming horses were once destined to disappear from the land.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Dramatic river bend surrounds a natural red-rocked pedestal.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

The final resting place of a controversial man who was instrumental in plucking the banjo from obscurity.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

The land is home to swimming ponies and a legendary 18th-century treasure.

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This former Cold War missile control site played an important role in the creation of GPS.

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

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A hidden bar inside an ad agency has a deliberately misleading name, so employees can stay late under pretext of paperwork.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.