Replace the light bulbs in an old chandelier with inexpensive solar lights. Hang it from a tree branch. You'll have gorgeous outdoor lighting without having to provide electricity. GREAT for an Evening Garden Party , ( even for just the two of you ) -Wedding, Birthday and Anniversary Celebrations could be enhanced by this.
This relaxing patio used a large tree to their advantage by incorporating it into the stonework. Find more ways to work around landscape challenges: http://www.bhg.com/home-improvement/deck/ideas/patio-tree-landscape-challenges/?socsrc=bhgpin070912