Amsterdam's Red Light District leaves little to the imagination.

A public urinal so pretty, it was declared a national monument.

The world's only museum devoted to the wonders of fluorescence.

A massive sustainable farm designed by the mastermind behind Central Park.

A chance to sleep among the firs and pines of the Oregon forest.

This nature center has one of the largest collections of native raptors in the Pacific Northwest.

Treehouse motel and treehouse-building school.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

The first declared National Monument in the United States.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

Tucked away on a scenic trail, a modest memorial honors one of the greatest writers of our time.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

When it opened during the final years of the embargo, all the drinks and cigars were free.

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

The most decorated dog of World War I is preserved in the Smithsonian.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

This grand gothic brewery has been pumping out suds for over a hundred years.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.