From super-sized natural wonders and man-made marvels to some of the weirdest, creepiest, and teeny-tiniest sights, we take a ...

Just a couple of miles from Mérida in Spain, Proserpina Dam was constructed during Roman rule around AD 100, with various ...

These out-of-place artifacts, or OOPArts, are surprising for their place and time — but there's an explanation behind each ...