The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

This beautiful train graveyard is one of the largest collections of steam locomotives in the Mediterranean and Europe.

Discovered after draining a local pond, these ancient man-made caves are still a complete mystery.

At nearly 1,000 feet long, this astonishing glass suspension bridge is one of the longest in the world.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

The world's only museum devoted to the wonders of fluorescence.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Rare recess caves fill this unbelievably beautiful Ohio park.

The eccentric mansion of one the most popular horror authors of modern times.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A one-of-a-kind collection of a unique medium.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A miniature train theme park, free to the public, laying at the base of the Santa Monica Mountains.

An iconic location along the Los Angeles River where countless movie scenes are filmed.

A Cold War site complete with rusty structures, hiking trails, and beautiful views.

This peaceful garden is hidden on the grounds of a spiritual organization founded by a pioneer yogi.

This stockpile of junked electronic and mechanical gadgets is a favorite among Hollywood prop masters.

A beloved carnival gets a modern makeover in Los Angeles.

World War II-era Nazi compound nestled in the Santa Monica hills.

The quiet canyon has a tumultuous history involving a doomsday cult.

The final resting place of a space program monolith.