I got few to x3 good ideas red x3
1.apocalyptic park
2.a circus style park x3
3.a mountain side park x3
4. A music park like freestyle mp
and 5. A traditional park with classic attractions x3

I like the idea about the apocalyptic park i could have a coaster that dives into a massive skull

That sounds epic x3 you could try what I did once; using the invisable track ctr and a ctr of. Choice I made a synced apocalyptic coaster where a truck jumps over the coaster and hits into a on fire building x3

^^ That sounds like a plan! =)