The Royal Botanic Garden is about 2kms north of Princes Street. It is super and free although entry into the glasshouses is liable to be charged for. The site covers 31 hectares with various habitats showing a huge collection of plants, trees etc. If you visit the glasshouses you may find that in many respects it is on par with the Eden Project in Cornwall. Everything is well labelled and there are audio aids to suit children as well as adults. The restaurant serves excellent food at reasonable prices.