The last surviving example of the elegant sandstone buildings that once ringed Circular Quay, this former customs house now features an amazing model of Sydney under a glass floor. You can walk over the city's skyscrapers, all of which are illuminated by meters of fiber-optic lights. Recenty renovated and with a new ground floor bar, Customs House has an excellent two-level library and plenty of art galleries. The rooftop Café Sydney, the standout in the clutch of restaurants and cafés in this late-19th-century structure, overlooks Sydney Cove. The building stands close to the site where the British flag was first raised on the shores of Sydney Cove in 1788.