Discover the obscured and the obscure in this informative exploration of an intriguing labyrinth of ancient alleys and byways. Route includes stairs and some steep slopes. Duration approx 1hr 40mins. Participants with dogs on leads welcome. Adult £5.50, young person under 16 £4. Tickets from Cornerhouse, High Street (Old Town Carnival Week office) or at the start of the walk. Donations to OHPS.