The only pollutant in the clear blue water is sunscreen.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

A giant Australian fruit and tropical farm.

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

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

Enter the world under the hill at this ancient UK burial chamber.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

This Scottish burial tomb once held hundreds of ancient eagle bones.

This Elizabethan hedge maze is one of only six in North America.