Your Tour is the best tool for creating multi-day road trip itineraries, and this Belgian-based start-up stands out for its deep coverage of Italy, France, Spain, Andorra and, randomly, Florida.

BBC: Tools to plan your itinerary faster

And of course it is a great tool to learn about the unique environment of the Tonle Sap Biosphere Reserve on your ecotourism trip to Prek Toal.

UNESCO: OFFICE IN PHNOM PENH