There's a great 1.8 server where you can survive and make factions, build in creative, play minigames, and build vehicles! It's called "The Moo Dynasty". New factions are arising and growing You can also buy guns from the spawn world using in-game money, but here's the best part:

You can build and drive tanks, submarines, and airships! You don't even need mods to use the vehicles!

Here are a few videos made by Dr_Moooo demonstrating tanks and airships, no mods!

https://www.youtube.com/watch?v=WpzZ41ueZ-4
https://www.youtube.com/watch?v=QCmMn2iMXeA
https://www.youtube.com/watch?v=NTZARRf3fbM

The server address is "TMD.servequake.com"