The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

The world-record holder for the longest bridge stretching continuously over water.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

A quirky Poe-themed joint on an island keen to celebrate its overlooked connection to the famous writer.

The maritime museum that boasts the largest nautical library in the western hemisphere.

During World War II, blimps were a key part of the United States' defense against German U-boats—this building could house a dozen of the armed airships.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

This abandoned train tunnel has been the subject of countless ghost stories for years.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

More than 21,000 images fill this overlooked gem of a prehistoric site.

Rare recess caves fill this unbelievably beautiful Ohio park.

A whopping 14,000 copper coins cover this miniature fighter jet.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

The highest point in Maryland is only accessible by hiking through another state.

This sprawling museum holds one man's giant collection of real tanks.

Ghost town with a beer-drinking goat for mayor.

This is probably not the Target you're looking for.

A World War II officers' club features Old West murals painted by German POWs.

Mysterious glowing orbs float through the desert night.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

Bizarre Cavern.