Crypts (5)
(Other definitions for vaults that I've seen before include "Jumps using pole" , "Arched ceilings or underground chambers" , "Burial chambers or strongrooms" , "Jumps, perhaps with aid of pole" , "Leaps with pole, or burial chambers" .)
(Other definitions for tombs that I've seen before include "Evidence of failure" , "Sepulchres" , "Places of burial" , "monuments" .)