Melbourne’s busy centre is based around a lattice of streets known as the Hoddle Grid. This is the oldest part of Melbourne and was laid out in 1837 by the surveyor Robert Hoddle. The CBD features the city’s iconic laneways and arcades, and is famous for its distinctive blend of contemporary and Victorian architecture. Five of the six tallest buildings in Australia are located in Melbourne’s CBD and among the luxury hotels, cafes, shops and bustling street life are some of the world’s best graffiti art precincts. Spreading out from the iconic Flinders Street Station, with its row of clocks on its Edwardian facade, the blocks of Melbourne’s CBD are crammed with luxury hotels, excellent restaurants, and some of Australia’s best shopping. Also within the bounds of the CBD are a number of the city’s most significant public buildings, art galleries and theatres. Melbourne’s iconic yellow and green trams ply the streets of the CBD and make getting around a breeze. Cafes and bars along the Yarra River offer an almost limitless choice of places to sit and enjoy the sublime Melbourne climate: well known for producing four seasons in one day.