i would say that a grave is like a point of connection. a place where, if you go, you can do meditation with a particular group of thoughts in mind. sometimes people visit meaningful places through do the same. you can have a look to this video (this YouTube channel is awesome, has plenty of interesting content).

https://youtu.be/4unDD4OUUNQ?si=s_8BKjc3WqDmWSeE