Pelisipodron

From Tardis Wiki, the free Doctor Who reference

Pelisipodron was a planet of jewels which the Seventh Doctor and Ace visited. According to a guidebook written by the Doctor, "Beneath the ice crust is an ocean heated by tidal friction. Every now and then the pressure becomes so great the water bursts forth, only to freeze instantaneously forming spectacular fountains and waterfalls." (AUDIO: Revenge of the Swarm)