I've conducted a search but couldn't find recent recommendations. We're interested in 3-4 hour walking tours covering various parts of the city, focusing on architecture and history. I explored Tours By Locals, but many of them were priced over US$500. While I understand they might offer excellent service, that seems quite steep (around C$700!) for just a few hours. We're willing to pay a fair rate, but that appears to be excessive. Any suggestions would be appreciated. Thank you