Pandapas Pond is the easiest outdoor escape from Blacksburg: a small mountain pond west of town with a flat loop path, forest, and access to a larger trail network. It is good for a short walk if you only have an hour, and it is also a starting point for longer hikes and mountain bike rides.
The setting is quiet rather than dramatic. That is part of the appeal. You can leave downtown, be among trees in a few minutes, and still make it back in time for dinner or a show.