Visiting subreddits of cities/countries you are going to as well as the respective
AskA.. communities is great way to know about a place. AskARussian is one such subreddit, it links to more similar subreddits in the sidebar.
Pod Room - Bite-sized Luxury Hotel (SF only) but pretty awesome.
Sonder - Beautiful spaces built for travel and life.
Common - Private rooms and beautiful shared spaces in friendly homes.
Hipcamp - Everywhere you want to camp.
trippy - Tiny and fast travel planner.
Visalogy - Visa Requirements and Passport Information.
Gradient Retreat Center - Place for writers, makers, and code writers to take a week away from their regular lives to focus on creative work.
Aero - Luxury Semi-Private Jets.
Tea With Strangers - Community organization that's all about making our cities feel more like neighborhoods by breaking the barriers between strangers.
Kibbo - Community pioneering a new kind of flexible and affordable housing model on the West Coast.
Duffel - Powerful and intuitive tools for starting and growing a travel business. Search, book, and manage flights across more than 20 airlines.
Gowalla - Social Game in the Real World.
Omio - Search, Compare & Buy Cheap Bus, Train & Flight Tickets.
GetYourGuide - Book Things To Do, Attractions, and Tours.
Cohabs - Private Room Rentals in Beautiful Shared Houses.