The largest stone circle in the world has ended up bringing up more questions than it has answered.

A fantastic castle rumored to be the birthplace of King Arthur.

The bones of two medieval royal lions were discovered at the historic fortress.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The sculpture of the deceased cockatoo flops atop its personal plinth.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Where condemned pirates met their grisly end at the gallows on the River Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This South London cemetery holds the remains of more than 15,000 people.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

A dark Victorian well house now plays host to mystical waters and pagan shrines.

Fascinating town where normal life interfaces with the occult.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The largest collection of Frazetta originals in the world.

A field of nothing but boulders which resembles a giant's gravel driveway.

This park contains a number of standing stones meant to heal and inspire.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Over 50 whirling pools left behind from the glacial age.