Straight from the shoulder, the most green neighborhood of Ljubljana is Murgle. Murgle is very well known among the locals, mainly because hot shots like former presidents lives there (Milan Kučan) but also because of its green urban plan.
Many people call this waterfall, Waterfall Kozjak, one of the most beautiful or one of the most picturesque waterfalls of them all. I would definitely agree with them.
There are a few events in Ljubljana that bring together young and old and if you happen to be in Ljubljana tomorrow, consider yourself lucky.
It is strictly personal, but Škocjan Education Trail is one of the most spectacular one in the country. And even though you don't need to be very fit to manage this trail, you will be highly rewarded. I can't emphasize this enough, but for everyone on the lazy side, I assure you, it is not a hard walk.
After writing a blog in Slovenian language for 10 years I have finally come to my sense and started writing one in English as well.