This Italianate Villa-style castle is pretty to look at, just keep off the private property.

This vast and otherworldly landscape is one of the largest dune complexes in North America.

When in Idaho, sleep in a giant potato.

This Idaho state park boasts the tallest single-structured sand dune in North America.

America's largest man-made forest was planted in an effort to bring back the past.

Over 600 acres of idyllic open grassland honor Nebraska’s georgic storyteller.

In addition to fishing and camping, this spot in Nebraska’s Sandhills is one of the world’s darkest places.

After sitting abandoned for decades, this historic mine is now the only publicly accessible chalk room and pillar mine in North America.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

This erect, phallic geological spire wasn't always named so domestically.

Roaming bison and a spectacular view at the highest point in Nebraska.

Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

The radio station that's been promising to make love to you for the last 15 years—if you happen to be on one specific block in suburban New Jersey.

A recreation of an Old West apothecary full of curios.

Hidden high on a remote mountain peak is a humbling and mysterious Vietnam War memorial.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

Colorado's only true geyser is hidden within the San Juan National Forest.

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

A desert settlement founded and later abandoned by Hawaiian members of the Church of Jesus Christ of Latter-day Saints in Utah's Skull Valley.

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

This amazingly preserved Gold Rush town is a historian's dream.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.