An exotic wildlife habitat right off The Strip.

A century after his death, this covered bridge still calls to mind the plein air painter who loved it.

The building was originally a gas station built to resemble a Japanese tea house.

A statue honors the genius who allegedly first took a meatball and made it into a hamburger.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

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

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

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

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

A house and yard adorned with bizarre concrete sculptures in a Milwaukee suburb.

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

A cow in the road might subvert the flow of traffic but this one's above it all, quite literally.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

The restored estate of a wealthy rancher was once at the heart of an unprecedented legal victory.

Remnants of the United States's largest accidental oil spill still mar a California valley.

This 19th century hydroelectric powerhouse was the first of its kind.

Rusty pieces of metal jutting out of a breakwater are all that's visible of the 12,500-ton ocean liner that capsized just off the beach.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

Opened as part of the New Deal, the training facility now features World War II-era structures and a pylon that once stood at the World Trade Center.

Home of the "Father of Forestry."

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

Gouged in the mountain to make stage coach access easier through the Fremont Pass.

A massive volcanic plug is now a protected area that hosts a number of bird species.