Palace where the nearly un-killable Rasputin was murdered.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An Argentinian businessman facing terminal cancer built this whimsical medieval village using salvaged materials.

Once swallowed by flood waters, this village has emerged as an eerie shadow of its former self.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

This stunning mass of ice spans 121 square miles and is still growing.

This abandoned fishing settlement may well be the greenest village in the world.

A part of the world's largest marsh seems to be growing bright red Martian grass.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Old and brave breed of warhorses known for their elegant, curved ears.

The largest tiger reserve in India is a vast expanse dotted with ancient ruins of Nagarjuna Viswa Vidyalayam.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

A complex of six forts embedded in the Rajasthan hills.

Sacred Indian temple that’s all monkey business.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

The remains of what was, not so long ago, the world's largest city.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Centuries-old bridges grown from tangled roots.

This huge clock made of flowers and simple machinery was once used a political weapon.

Kentucky's longest operating jail is now a spooky spot to spend the night.