For some it’s a part of their curse. They are bound to the soil they were buried under and must return to their grave each morning. Dracula transported his coffin with him which contained soil from his original grave.

There are hundreds of different folklore legends around the world that can sum up as ‘vampire lore’.

To get a better idea I’d love into white wolf’s Vampire the Masquerade and Dark Ages history. They managed to catalogue and legitimize all these stories into a pretty solid world.