Even if you don't like birds, I suggest going to the Lab of Ornithology for the views, a really cool building, and the hiking trails.
If you do like birds, you're in for a treat! The lab is a working laboratory, a museum, a library, and will provide you with any information you ever wanted to know about birds. There are public spaces with huge glass windows (binoculars provided) to do some indoor bird-watching, all sorts of computers to learn about different species, exhibits about the local area, and many very helpful employees eager to answer your questions.
One highlight of the lab is the Macauley Library, which is the world's largest archive of animal sounds and videos.
The building is surrounded by hiking trails--wear bug spray, bring binoculars, and enjoy!
Hours of the building are as follows:
Monday-Thursday: 8:00-5:00
Friday: 8:00-4:00
Saturday: 9:30-4:00
Sunday: 11:00-4:00
Trails are open 365 days a year.
From journal What to do for 5 Hours or 5 Years in Ithaca