Walked the ruins of Pompeii. It was hot and it’s fairly dusty in there. Most of the highly prized ruins are locked down. So you need to book a tour to see the good ones.
Pompeii is about 8km from Mt Vesuvius. In 79AD it was buried by pumice and ash when Vesuvius erupted. It existed mostly because of agriculture and people were used to frequent tremors. Evacuations was planned by Pliny the Elder but he died helping people escape. We actually know what happened because Pliny the Younger ended up writing a first-hand account of it.