Nazareth Walking Tours

Where do I go for the walking tours in Nazareth? Do the Nazareth hotels take care of the arrangements for me? They say the walking tour to the old city is amazing. It lasts for three hours and provides a great exercise and penitence for devout Catholics. My friend who went there last year told me about the tour, with pictures, of course, to supplement the story. But she said words fail her tremendously every time she tries to tell people about this experience. She claims it is very moving. I cannot wait to experience it for myself. I am very excited to go.