A stunning landscape of bunkers that once stored chemical weapons.

A bronze replica of half-consumed salt lick honors a quirky town tradition.

The last SR-71 ever constructed.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

Experience a charming 1930s version of "infotainment."

The drama of nature in full effect in this Nevada State Park.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

Massive still life just off the highway in Kansas.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A wonderful collection of all things Oz is nestled in the heart of Kansas.

A diverse, expansive nature preserve in northeastern Kansas.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

This century-old street sign is a forgotten remnant of the old city.

While most bridges allow roads to pass over water, this one allows water to pass over a road.

This functional solar system model was inspired by the famous Eisinga Planetarium.

The 20-mile causeway that separates the Netherlands from the sea.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

A Netherlands hotel where you can sleep inside a wine barrel.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.