Woman Wept had a continental land mass shaped like a lamenting woman. The entire ocean, including waves hundreds of feet high, froze in an instant because of an event involving its sun. (TV: Boom Town) This was later revealed to be due to the planet being moved from one place to another. (TV: Journey's End)
Woman Wept was stolen by Davros and the Daleks and was placed in the Medusa Cascade. (TV: The Stolen Earth) When Donna Noble defeated the Daleks, Donna, the Tenth Doctor and the Meta-Crisis Tenth Doctor helped return the planet to its rightful place. (TV: Journey's End)
Behind the scenes
According to The Doctor's Lives and Times, the race for Enlightenment began in orbit of Woman Wept.