Here's why:

* Groundwater: Water that exists underground in the spaces between soil particles and rock formations.

* Magma: Molten rock found beneath the Earth's surface.

* Heated: The magma's heat warms the surrounding groundwater.

* Rises: The heated groundwater becomes less dense and rises towards the surface.

* Natural pool: The rising hot water often collects in depressions or natural openings at the surface, creating a pool.

Hot springs are often associated with areas of volcanic activity, where magma is closer to the surface.