One of the Shock Lands reprinted in Return to Ravnica:



Hallowed Fountain
Land - Plains Island (Rare)
(T: Add W or U to your mana pool.)
As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, Hallowed Fountain enters the battlefield tapped.
Flavor Text: "A place to relax, if you have the proper permit."
Illus. Jung Park #241/274