The perfect burger near Bard College…While spending a few summer days in the Hudson Valley to see performances at Bard’s Summerscape in Annandale-on-Hudson, I met the perfect burger at Terrapin. This was what I had from the create-your-own-sandwich menu: a medium-rare quarter pound Coleman beef burger on a brioche with avocado, Swiss Gruyere, and sherried onion confit ($8.95).