Chest tombs are a particular variety of sarcophagus tomb. According to Stories in Stone, they resemble “a large trunk or shipping container” (32).
Lake View Cemetery has a lot of chest tombs. Usually it’s readily obvious that they’re not real sarcophagi holding a body because they are used as a family monument and then are surrounded by little head-and/or footstones.
I find chest tomb monuments to be interesting, but I don’t find the design aesthetic particularly appealing. Individual chest tombs can have beautiful decoration, but it still seems to me a strange basic design to have become fashionable.