1. Travel Chat
Forum has 41,438 topics.
http://www.travelchatforum.com/  

2. Travel
Travel forum and particular forums where we keep discussions around holiday and tourism. Have the opportunity and setup your own social group or travel diary on tourismzone and tell the forum world...
http://www.tourismzone.com/  

3. Tauck Community
Tauck Travel Forums is an online community of past and prospective Tauck travelers, ready to offer insights and first-hand knowledge of our 100+ engaging, enriching journeys to all seven...
https://www.tauck.com/travel-forum.aspx  

4. Start Backpacking Travel
Use the backpacking forums to get answers for your next trip! Find travel jobs posted, writing opportunities, and more. See two excellent travel forums.
https://www.startbackpacking.com/forums/  

5. Clubbing Holidays
Forum has 228,886 posts.
http://www.clubbingabroad.co.uk/forum/  

6. The TrekEarth Forums
This is a discussion forum powered by vBulletin. To find out about vBulletin, go to http://www.vbulletin.com/ .
https://www.trekearth.com/forums/  

7. Geocaching Forums
https://forums.groundspeak.com/GC/  

8. Travel
http://www.travelpod.com/forums/  

9. TravelPUNK Backpacker College
TravelPUNK Backpacker, Student, Budget, College Travel Message Boards, Travelpunk, tpunk, TPUNK, travelpunks, backpacker tips, budget travel, student travel, Eurail passes, hostels, hostels in Europe
https://www.travelpunk.com/boards/