The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

One of only two commuter aerial tramways in the United States.

San Diego's most historic and haunted home.

Home to three historic ships from the age of Vikings.

Mysterious 500-year-old tapestries depict a unicorn hunt.

"Only the devil could play golf here."

This famous city eluded concrete detection until the early 2000's.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Home to items never before seen by the public.

One part local history, 99 parts gruesome haunted house.

An unusual round church in London with a Templar past.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The hallucinogenic center of the ancient world.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A beautiful geyser under environmental threat.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Elevated freight railway turned wildly successful urban park.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Famously misunderstood wonder of the ancient world

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.