I recommend the Cleveland, Ohio outlying area. I saw a lot of them there, for instance around Holden Arboretum.
For my favorite, I nominate the Wandering Glider (Pantala flavescens), also known as Global Skimmer. The link takes you to the observations map so that you can see the reason for the latter name – it is truly global. It is also such a strong distance flier that it is the only dragonfly found on many remote oceanic islands.
Plus, I have had such wanderlust myself, I am naturally drawn to any taxon that inspires someone to call it the “wandering” this or that. I see on Wikipedia that another of its common names is Globe Wanderer, which has got to be one of the best taxon common names ever.