
Splash is loaded with waterfalls. That's always fun. Grab the enemy flag and take the plunge into the deep. Going down is easy, climbing back up with the flag is difficult. Alternately, you can take the wood bridge back to your base, but this leaves you open to enemy fire.

Down below, there's an island you can hide in, for when the enemy comes after you.

If swimming is your bag, go down deep underwater to find a hidden cave with a health keg and a particularly helpful weapons locker.