Mausoleum - An external free-standing building constructed as a monument enclosing the interment space or burial chamber of a deceased person or people.
Pyramid - A structure whose outer surfaces are triangular and converge to a single point at the top, making the shape roughly a pyramid in the geometric sense.
Sarcophagus - A box-like funeral receptacle for a corpse, most commonly carved in stone, and usually displayed above ground, though it may also be buried.
Turbe - An Islamic building enclosing burial chamber or grave (individual or group). Usually domed, can be opened with a columns supporting a roof or enclosed space. In the case of a mausoleum, use tomb=mausoleum with mausoleum=turbe.
Burial vault - A structural underground tomb, formerly made of wood or brick but more often today made of concrete, that encloses a coffin to help prevent a grave from sinking.