This period that left behind numerous courtyard houses, mosques, shrines and walled enclosures. Both monuments are stone slabs originally erected on carved stone turtles within walled enclosures. The Acropolis was situated just south of the centre of this walled area. It has been walled up since medieval times. The city was once fully walled, and some wall sections and gates remain today. The districts were walled and guarded for taxation and access control. Originally, there were gates on all of the four sides of the walled city. The Acropolis was just south of the centre of this walled area. Shawood Lake is southwest of Walled Lake. They defended themselves in Kat Hing Wai, a walled village. Ledra Street is in the middle of the walled city. The younger lowland exhibits steep walled mesas and knobs. The ramps were not walled in and were visible from outside the stadium. They were in search of a mythical walled and wealthy American Indian city named Norumbega. It would have been walled up a few centuries ago.