Gungans evolved in the swamps of Naboo, becoming almost equally well adapted to life on land and in water. The amphibious beings live in underwater cities hidden in deep lakes, breathing air or water with their compound lungs. Secret techniques allow Gungans to "grow" the basic structures of buildings and vehicles, which are complemented and finished by Gungans artisans in organic styles. Gungans trade with Naboo for certain items of technology, but manufacture everything else they need from the various resources of their underwater habitat. Although Gungans use mechanized vehicles, they have a close affinity with the natural world and still prefer to utilize living mounts and beasts of burden.