Once the future of underwater combat, this old sub is now open for visitors to muck around in.

One of the few brewers in the U.S. experimenting with hop-free beers.

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

The mansion and cenotaph of the New Hampshire Faust.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

A stone memorial erected for New Hampshire's only convicted witch.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A student driver's nightmare.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

The world's largest Holstein cow.

An icon among Florida's pre-Disney tourist attractions, just west of Orlando.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

Stairs often replace streets on the steep slopes of this old mining town.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Stumps of an Ice Age forest, visible only at low tide.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

A defunct all-girls college which may be the resting place of H.P. Lovecraft's real-life Necronomicon.

The world's largest military aircraft cemetery.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.