The Hot Air Balloon or simply "The Balloon" is a vehicle the player gains access to after completing the main story. It is located just Southeast of The Chapel of the Pilgrim.
Calling the Balloon
The player can call the balloon from any campfire they've placed in any campsite. To do this, walk up to a campfire, interact with it, and scroll down to "Call the balloon". This will spawn the balloon just above the campfire it was called to, and it will slowly descend until it touches ground. This feature is particularly handy if the player forgot where they parked the balloon, don't feel like walking back to the balloon, or has gotten the balloon stuck.