In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

A mysterious ancient network of thousands of perfectly straight lines stretching across miles of Bolivian desert.

One of the great math minds of the 17th century is underfoot in this 900 year old Dutch church.

The remains of a medieval wall discovered in the basement of a jewelry store.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

An architectural marvel built by a nearly forgotten Canadian Quaker sect, the Children of Peace.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

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

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

The first singer to cut a country music record is buried in a small graveyard in Atlanta, Georgia.

This Old West prison built into the side of a cliff was said to be inescapable.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

The beauty of urban decay, hiding some dark secrets.

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

An impressive collection of farm equipment and other artifacts from life on the prairie.

A former utopian healing center created by a huckster and built by derelicts.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

A lovely look back at the manufacture and use of paper in all its forms.