These pretty kitties killed and ate as many as 135 railway workers.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

Shop of curiosities with a dinosaur museum tucked in its basement.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A lush green oasis in the middle of Chicago.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

143 feet of leaping muskie whose mouth can be used as a wedding venue.

The world's largest talking cow would like to tell you about the benefits of 100% Wisconsin dairy products, if only she still could.

Tirelessly maintained by a Wisconsin man named JFK.

The menacing creature had a tremendous influence on the local culture before being exposed as a hoax.

Paranormal activity on the great lakes.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

A remote hill on a stretch of country road where the laws of physics are defied... or so it seems.

The center of the only hemisphere that awards visitors with a commemorative coin.

The arboretum whose marshy soil sucked up the dreams of housing developers.

This pebble beach is so beautiful that taking its rocks is against the law.

This cave holds a surprisingly colorful variety of geological oddities.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Robots, lasers, and whoopee cushions, oh my!

Eight feet in diameter and more than 24 feet around.

Two hula hoops appeared on the tree after a storm, and the collection kept growing.

The World's Largest Bull.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.