Bergamo in September is beautiful – not insanely hot yet warm enough to walk around with sandals. Bergamo airport is conveniently located and only a short drive away (around 15mins). The town centre is quite small but charming. During my visit, there was some sort of a garden/landscape fair, so there were quite alot of exhibitions around the northern part of the town. The architecturally impressive cathedral and many churches are definitely a must see. The castle is one of the major highlights of Bergamo and you can reach it quite easily – I walked to the base of the hill and then got onto the funicular. The views from atop the hill are beautiful. There are a lot of shops and cafes in this area – the Pasticciera’s (bakery) were my favourite as they had sweets that I’d never seen before and tasted amazing! You can easily explore the city in a day or two… Good spot to break down journey time to and from Milano and Bologna.