Oasis

An  is a pool of water in the middle of a desert.

Tegana visited an oasis to get water for Marco Polo's caravan, but instead slit Marco's water pouch.

An unnamed desert planet had at least one oasis on it, which the First Doctor, John, and Gillian visited. (COMIC: Plague of the Black Scorpi)

The Andromedary was used on Bruvoldaveer to travel between oases. (COMIC: The Salt Solution)