One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

"Alleys of Stone" form natural mazes in Spanish natural park.

Cliffside houses provide a spectacular view from their perch above the valley.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

Commonly acknowledged as the only public monument to the Devil himself.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

An ancient Egyptian temple in the middle of Madrid, Spain.

A library where thousands of books explain how to avoid another Great Recession.

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

A scattered trail of street art adds a pop of color to the city's stark structures.

This remote Scottish isle is only inhabited by seals, birds, and the memory of a tragic settlement.

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

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

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

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

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

A six-ton wedding present for the King of the Scots.

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

This Scottish museum is the only one in the world to focus not on one religion but all of them.