Rebuilt remains of a temple to Roman god Mithras.

A student driver's nightmare.

The western face was supposedly left clock-less to snub the Welsh.

This bronze statue was dedicated to a 1966 Beatles hit.

Prehistoric sandstone menhir with Early Bronze Age cup and ring markings, also known as Robin Hood's Stone.

Much of what constituted mid-century Liverpool now litters a beach outside of town.

These haunting ruins belong to an ancient village that once had one hell of a view.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

This tiny museum's sizable collection is jammed into a former underground public toilet.

Op-art architecture designed for happiness.

The topiary maze at the Habsburg hunting lodge.

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

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

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.

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

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

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

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

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

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.