The Hot Spring is a location in Pokémon Mystery Dungeon: Explorers of Time & Darkness. It is accessed for the first time in chapter 5 when the player character clears Waterfall Cave. The player character gets a dizzy spell but was too late to warn their partner and they are washed away by a flood. The flood washes them all the way to the Hot Spring and they are ejected out of vent and into the spring. An Elderly Torkoal tells the two where they are and lets them enjoy a soak to wash away their fatigue. Later, the Player and Partner return to the Hot Spring to ask Torkoal about the way to reach the Hidden Land.
After the player and partner graduate from Wigglytuff's Guild, the Hot Spring is not accessed via Waterfall Cave; rather, it is accessible directly from the location menu at the Treasure Town crossroads.
Spring Cave is located near the Hot Spring and shares the source of heat with it.