This week’s photo challenge is all about time, and there’s nothing that captures it quite like the city of Pompeii. It was famously destroyed by the eruption of Mount Vesuvius (seen looming in the background) in 79 AD. It was completely wiped off the map, and it wasn’t until 1599 that traces of it were unearthed. It wasn’t properly rediscovered until 1748, and it’s been a major archaeological site ever since. Its preserved remnants – victims and their culture, forever frozen in time – are both beautiful and tragic. A larger version is viewable here.