Ithaca knows about ice cream. The sundae was supposedly invented here in 1892 & Purity has around since 1936. If you are looking for something special try the Boston - a shake with a sundae on top.
You have to order a sundae (the Ice Cream sundae was allegedly invented in Ithaca in 1892); I suggest the brownie version. If it is nice out, enjoy the outdoor patio.
During USS Accord's Watkins Glen Weekend, people often go here for dessert after the Saturday night dinner. Sit outside at night; it's never too chilly for ice cream!