Something that reminds you of death is sepulchral. A dreary, misty graveyard at night usually feels sepulchral.
A sepulchre is a tomb or a crypt — a kind of stone room meant for burying a dead body. Something that's sepulchral reminds you of a sepulchre, either because it looks or feels like an actual tomb, or simply because it makes you think of death or dying. An empty building might be sepulchral, or a gloomy gathering. The Latin root word is sepelire, "to bury or embalm."