The family vault is empty by night and occupied by day, becoming the proving ground for Lucy's unnatural double existence.
The Westenra Tomb holds the coffins of Lucy and her mother in a damp, discolored Hampstead vault. At night Van Helsing and John Seward cut into Lucy's leaden coffin and find it empty; by day her unnaturally fresh body lies inside again.
Van Helsing uses garlic and sacred protection to control entry and prevent Lucy's movement while he keeps vigil. The tomb becomes an experimental boundary where skepticism repeatedly gives way to observed fact.
A grim time-stained stone vault with rusty iron, dead flowers, dust, insects, heavy doors, metal coffins, and a yew-lined avenue outside.
The tomb is both vampire refuge and chamber of proof, allowing the hunters to compare Lucy's nocturnal absence with her daylight return.