The Lonely Planet suggests it is possible to see all the major sights around Sigulda (i.e. mostly the castles) on foot in a day. Is this realistic and is it easy to navigate between places? What is the minimum time required for a relatively relaxed exploration of the castles? How about eating options for lunch - are there places to eat around the Krimulda and Turaida areas or just in Sigulda town itself? Thanks for the advice!