Surreal works of unreal stone and metal dot the landscape of this Latvian art park.

Guests become prisoners on a visit to Latvian prison.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

Known as the leaning temple, the sacred structure has somehow developed a severe nine-degree slant.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

A madman's personal garden filled with 1,000 sculpted heads.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

A fifth-century temple improbably built into the side of a cliff.

Caves full of Buddhist statues, incredible rock formations and a deserted lagoon.

The field of tiny caves that mark this Chinese cliffside are each their own historic Buddhist temple.

This sensational Chinese temple walks visitors through the 76 weird departments of the afterlife.

Ming Dynasty necropolis raided during the Cultural Revolution.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Built in 1911, the Tees Transporter Bridge is one of only six transporter bridges still in operation.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

The first declared National Monument in the United States.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

Medical museum that houses most notably the taxidermied remains of Vladimir Demikhov's famous two-headed dog experiment.

A mesmerizing reservoir nestled at the heart of a pre-Islamic Yemeni village.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

The ornate miniature mansions were built for Istanbul's feathered residents.