The rich cultural city of Sirkap, or "Severed Head", chronologically the second major city of Taxila, is to be found spreading down the Hathial Spur and onto the plains of the Taxila Valley. It is bound by the Tamra rivulet and to the north and south by the Gau rivulet which today has been almost completely obliterated by a modern road and water channel. The present layout of the city was established by the Bactrian Greeks sometime around 180 B.C. and takes the form of a wide and open grid system. In general, the city presents a better planned architecture than Bhir Mound. The city is encompassed by an almighty wall over five kilometers long and up to six meters thick. There may well have been an entrance on all four sides originally, but today the only one evident is the northern wall and it is through here that today's visitors would normally enter the city. A number of temples and monasteries can be found here such as Apsidal Temple, Sun Temple, Shrine of the Double Headed Eagle, Kunala Monastery and Ghai Monastery.