I love the moveobjects on cheat of all cheats in existence of sims 3. I just discovered a new potential of it. We can make underwater tombs. the underwater tombs are more dangerous than the regular tombs as your sim may drown but its a fun experience.
Your sim can grab ancient coins under swimming pools:
They can insert key stones and step on floor switches:
They can also clear rubble:
The sim may need some rest though, They get fatigue faster and there are tendencies of drowning but it makes adventures more fun to me as there is a danger.
They can also open treasure boxes underwater.
I hope I can inspire people to make underwater tombs.