Station 2 is the second station on the Canals map. This station is often called Nosebleed, because one of the writings on the wall says so. In Half Life 2, this station is deserted and located under a Combine mounted gun. You will find a radio here which broadcasts a female refugee's voice which keeps saying that you, Gordon Freeman, are moving through the canals.
Station 2 is the most visited station on the Canals and often a place used for reunions and such.