A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

Abandoned castle was once a grand example of Russian privilege, built exclusively to win a frivolous bet between noblemen.

This deceptively salty lake looks like blushing pink lemonade.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

A beautiful maze marks where three countries meet.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

Half of a waterfall goes into the river while the other half seems to disappear.

Earth's greatest purely vertical drop at 4,101 feet.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

One of the most extreme deserts in the world, these snow-free valleys harbor life, despite the hostile environment.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

Ancient rock-hewn town that witnessed key events of Georgian history.

A Boeing mechanic and his wife leave a whimsical, stone sculptured garden as their legacy.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

Hanging over one of Japan's "hidden valleys," these vine bridges must be remade every three years.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

Abandoned bridge hidden deep in the San Gabriel Mountains.

Thousands of well-dressed mummies below a monastery.

A unique Tuscan hideaway acts as an art mecca as well as a hotel.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.