The Botanical Garden of the Comenius University in Bratislava is such a nice place for a walk. It is quite close to the city center, but you wouldn't now it being there :)
I think editing trees in HDR is quite hard. HDR brings out so many detail and it whole becomes a one big mess. I had the same problem with this one, so I mixed it with the original shot (0 EV) to bring back the shadows in the trees and separate them from each other. I think I was quite successful :)
HDR from three shots, taken with Canon 450D with Sigma 10-20mm lens, handheld. Photo taken in late summer of 2010.