This elaborate towering structure was once famed for its revolutionary height.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

A 70,000-square-foot institution dedicated to a very literal, creationist perspective on the Book of Genesis.

Where beautiful signs live on forever.

A castle built by an eccentric medieval enthusiast in rural Ohio.

This striking art museum holds an amazing series of curiosity cabinets.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

A unique botanical garden housed in three giant geodesic domes.

This deceivingly ordinary warehouse hides an enormous collection of pop culture treasures.

A theme park attraction designed to turn your children into LARPers.

This unique zoo is the only place in the world where you can see all 15 species of crane.

A bizarre house filled with an astounding array of collections.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

This cave holds a surprisingly colorful variety of geological oddities.

More than 5,000 contemporary and "historic" mustards from around the world.

Amateur taxidermy museum known for its large collection of white squirrels.

A largely forgotten and touching neoclassical marble fountain overlooking a bear mound effigy.

This forgotten beach house built to look like a Frank Lloyd Wright masterpiece overlooks a hidden beach.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

The highest point in Wisconsin is capped by two towers that are not as mythic as Tolkien's but provide much better views.

Tirelessly maintained by a Wisconsin man named JFK.