Thyatian Thermae
by Marc SaindonSimply enough, a trip to the Thyatian bathhouse converts a Short Rest into a Long Rest as a game mechanic (once per day). Other sophisticated cultures might have their equivalent (Milenians, Ochaleans) but even a group of Hollow World Brute-Men might have access to a properly managed hotspring.
For Thyatian Gladiators, for example, the Thermae would play a key part in their training and resting between performances.
Glantrians might have their own magical take on the spa experience.
image from: https://www.deviantart.com/hamaterasu25/art/Roman-Bath-892706526