Vihar lake and Powai Lake sandwich the IIT Bombay campus and while powai lake is small and dirty, Vihar lake is a mighty god awesome lake(that happens to be a prohibited area as it is the main source of water for the city of Bombay). Up until recently, there was nothing to stop us iitians from going to the lake (though it is illegal) and lots of us used to. However after a few panther/leopard attacks and other issues we've had a 10 foot fence separating the institute from its sylvan neighbours. In a month or lesser Vihar lake will get completely cut off from iit :(
Meanwhile, a few of us went swimming in the lake and here are a few photos of a place that only a few people have seen and fewer will ever get to see again.