The Vienna Central Cemetery is actually one of the largest cemeteries in the world. Going to a graveyard isn’t exactly the first thing that comes to mind when you travel to a new city, but there’s something grimly fascinating about wandering around a cemetery so large.
I actually didn’t even realize that there was a second city that was wiped out by the Vesuvius eruption that you could visit — Herculaneum, which is decidedly smaller than Pompeii, but definitely worth a visit.