What to see in Hong Kong and Cambridge in July

I will be in Hong Kong 16 to 18 July for the Second International Conference on Open and Flexible Education (ICOFE 2015) at Open University of Hong Kong (OUHK), then via Guangzhou (China) to Fitzwilliam College Cambridge (UK) 21 to 28 July for the 10th International Conference on Computer Science & Education (ICCSE 2015). Anyone I should visit along the way?