The world's first aircraft factory has been hiding inside an automobile plant for almost 80 years.

The largest ancient burial mound in Ohio.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Abandoned since the 1950s, the streetcar lane beneath the heavily trafficked bridge lays empty and unused.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

The childhood home of one of Ohio's favorite sons, pilot and war hero Eddie Rickenbacker.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

A gas station has taken the place of the home of the 19th American President.

Ancient ruins hidden underneath a modern luxury hotel.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

These spartan apartments are provided to clergymen visiting Vatican City.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

The mystic whose incorrupt corpse still attracts the faithful.

A huge enchanting public park just outside the ancient walls of Rome.

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

A small town lost in the mountains of southern Italy hosts the childhood home of one of the most famous saints of the 20th century.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Erotic art covers the walls of the largest ancient pleasure palace.