It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

A sea cave with a waterfall and Viking past

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

A close look reveals that the Scottish monument is just slightly off-kilter.

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

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A sweet symbol marks the place where torturous executions were once carried out.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

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

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

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

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

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

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

360° views of the city plus five floors of optical illusions and hands-on science.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Ancient cliffs resembling a kilt on Scotland’s second-largest island emit an entrancing sound.