Moon (Fascination)

A moon with 'crystal blue lakes and diamond waterfalls' was once visited by the Fifth Doctor and Peri Brown.

At some point after their adventure on Sarn, (TV: Planet of Fire) Peri asked the Doctor to take her somewhere 'interesting' and they arrived on this moon, but the lakes and waterfalls had all been frozen as the moon had been on its outer orbit at the time. (PROSE: Fascination)