An early creation by Erich Mendelsohn.

A plaque marks a former safe house on the secret route, now hidden next to a McDonald's.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

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

An exotic wildlife habitat right off The Strip.

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

A special area of the National Archaeological Museum of Naples is located inside a metro station.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

Everything you always wanted to know about borates is here.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

A stunning landscape of bunkers that once stored chemical weapons.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

A volcanic landmark located on an Ice age lake bed.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

A volcanic fissure over two miles long and up to 70 feet deep.

At the base of Steens Mountain resides an otherworldly desert.

It was once used as a classroom to teach mining skills to local high school students.

Home to a timed geyser created by complete accident.

The largest outdoor art gallery in the Northwest United States.

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.