An unexpected alley with light shows and nature views.

The world’s oldest active sailing ship.

A mesmerizing disco ball-like sculpture along the Sacramento River Walk.

I Street Bridge is the heaviest swinging center bridge in the United States.

Art Deco stylings conceal the true nature of this bridge.

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

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

Baltimore's first skyscraper may be home to the inspiration behind pulp fiction's most celebrated bird.

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.

A statue based on a tragic Japanese nursery rhyme, commemorating San Diego's sisterhood with Yokohama.

An ode to the friendship between four Pacific Rim countries.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

A surreal, interdimensional shopping center and portal to another universe by Meow Wolf.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A marble cornerstone marks the location of what could have been a presidential palace.

Visitors to this library are in for a real-world education in modernist architecture.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The fifth-longest natural arch in the world, and the longest outside China.

A sharp bend in a dramatic river canyon cut through red rocks.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

This now-abandoned part of the original transcontinental railroad route provides a surreal driving and historical experience.

A beautiful geyser under environmental threat.