I built the McDonough Family cemetery on the Villareal lot in Windenburg for my Drifters. There's one mausoleum for each generation. The first one you see there is a bit different/special because it's for my founder, Ella McDonough. All the others are exactly the same.
https://i.imgur.com/wW5fpYS.png
Kind of hard to see anything with those big trees there, but there's two GF ponds and a big fountain in the middle as you walk through the front gate. Lighted walkways to each row with benches for families to come, sit and remember their loved ones.
https://i.imgur.com/LMbhsQO.png
The inside of each mausoleum has two pedestals for the generation heir and their spouse, plus a rose in a vase between them. Little trinkets are left on or near the urns that were special to the Sim. for instance, that kitty toy was for House 2 Della's husband, Royce. He had the childish trait and that was his favorite toy.
https://i.imgur.com/P5IdtT2.png
What would I do different? Probably just build one big Mausoleum with sections for each generation and put more landscaping outside. I love the look of the little mausoleums, but the lot lags a bit and I think that might be why. I have no idea.
The only other cemetery I've had was a small one I downloaded from the Gallery for the star of my Homeless Elder challenge. After the challenge was complete, she opened a Retirement Home and adopted a child to be her heir. I needed somewhere to place my elder and the residents when they died.