A pilgrimage to your local park? Why not? It's close by, probably has some green stuff (ie., trees, grass, etc.), maybe some water (lake), and probably some picnic tables to eat your lunch at. Maybe you should throw an old blanket in the car, just in case.
Now open your eyes and look around you. See if you still have time for a brisk walk around the baseball field or other safe path. Spend your last few minutes taking in the cool greens, the soft rustle of the breeze in the leaves, the still waters of the lake, the innocence of children playing in the playground. Whatever your local park features, you can most likely use it to relax and unwind for a few minutes, especially if the price of gas is keeping you from venturing much further.
I enjoy visiting the local park wherever I happen to be. No two are exactly the same. Some have quirky, creative play areas and trails. Some have lakes and trees. Some have swimming pools or bike paths or skate parks. Parks also tend to be kid- and pet-friendly. A community park reflects its community.
If you don't have the time or money for a longer journey, try your local park!