Couchsurfing has groups for individual countries, and sometimes specific cities/locations. You can read through the groups to find destinations, or post your questions to the group.
Ranked in these QuestionsQuestion Ranking
Pro Gives you a chance to talk to locals
Group members are made up of both locals and travelers. Participating in the groups gives you a chance to ask locals questions and get insider information about the best spots.
Pro Very friendly, welcoming community
Most people on couchsurfing are very friendly and love to chat with others. Members are often very happy to help out with suggestions.
Con No feature specifically for finding attractions
Couchsurfing does not provide a list of available attractions in various locations. The only way to discover things to do on your trip is by chatting in the groups or by sending messages.