The quaintest part of the city and location of the University of Aberdeen's King's College Campus, along the High Street and the streets leading off it, with modern university buildings further from it. The Chapel and Crown Tower at Kings College date from the 16th century (the tower is a symbol of the city as well as the university), while many of the other houses and buildings on the High Street and nearby are centuries old. The university's Kings Museum (M-F 9-5, free) a little way up the High Street puts on rotating displays from the university's collections. The new University Library (looks like a glass cube with zebra stripes) has a gallery space open every day with rotating exhibitions (free; check website for opening times), and you can explore the library (it's open to the public) which has outstanding views of the whole city and sea from the upper floors. The Old Town House at the top of the High Street (looks like it's in the middle of the roadway) has a visitor centre with leaflets on the area's heritage and rotating exhibitions. You can also explore the scenic and serene Cruickshank Botanic Garden which belongs to the university and is used for teaching and research, as well as being open to the public. The nearby St. Machar's Cathedral on the Chanonry (a continuation of the High Street) with its two spires, was completed in 1530 and is steeped in history and worth a visit (Aberdeen has three cathedrals, all named after saints). As it is part of the Protestant Church of Scotland, it does not actually function as a cathedral but is always called this. To get to Old Aberdeen, bus route No.20 from Broad Street takes you right there - get off at the High Street. Alternatively take No.1 or No.2 from Union Street and get off on King Street at the university campus (by the playing fields).