Karass Don Slava

Karass Don Slava was a location where the Candle Meadows were found. The Doctor once went to the Candle Meadows, and accidentally got psychic pollen stuck in his TARDIS' time rotor. (TV: Amy's Choice)

Behind the scenes
According to The Time Traveller's Almanac, "Karras Don Kazra Don Slava" was a notable planet of the 51st century which hosted beaches of intelligent sand and seas full of talking fish.