The Sydney CBD is an area of very densely concentrated skyscrapers and other buildings, interspersed by several parks such as Hyde Park, The Domain, Royal Botanic Gardens and Wynyard Park. George Street is the Sydney CBD's main north–south thoroughfare. The streets run on a slightly warped grid pattern in the southern CBD, but in the older northern CBD the streets form several intersecting grids, reflecting their placement in relation to the prevailing breeze and orientation to Circular Quay in early settlement.
The CBD runs along two ridge lines below Macquarie Street and York Streets. Between these ridges is Pitt Street, running close to the course of the original Tank Stream (now tunnelled). Bridge Street took its name from the bridge running east–west that once crossed this stream. Pitt Street is the retail heart of the city which includes the Pitt Street Mall and the Sydney Tower. Macquarie Street is a historic precinct that houses such buildings as the State Parliament House and the Supreme Court of New South Wales.