Duluth mineral magnates built this charming art deco lodge to be their private clubhouse.

Large pioneer village showcasing life during boom times.

This missionary's legacy looms large over the Upper Peninsula of Michigan—literally.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

Today this bizarre rooftop phone booth seems like a piece of kitsch but it was once used to spot disastrous storms.

The dream home of an iconoclastic renaissance man still stands as a monument to his domestically mundane vision.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

Electrical pylon in the shape of Disney's beloved mouse.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

A failed, un-built suburb that has been going feral for decades.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

Grab a slice of pizza next to the remains of the "human monkey" who ran for mayor.

A mysterious castle built as a monument to lost love.

An underwater city for the dead.

This glass-stain Mary attracted thousands of pilgrims until her head was shattered by a vandal with a slingshot.

"Bite or Smite" became the unlikely mascot of a Tampa suburb.

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

Formerly secret, precariously perched boulders.

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

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

This frequently-photographed waterfall takes only a short hike to visit.

The seamy, underground secrets of Portland's criminal past.