About Beech Tree Cantina...The Beech Tree Cantina, located on Main Street in Hyannis, MA, combines a beautiful location with an inviting atmosphere, fantastic food and is open year round. With a bar nestled comfortably underneath the historic tree, guests enjoy an authentic Mexican menu. Our featured item is the table-side guacamole, a delicious side dish. In addition to a Mexican menu featuring grilled burritos, baked enchiladas, tacos and more, we also serve northern-flavored cuisines. The margaritas and night life are a big hit—we were voted best cocktails by Cape Cod Life—so it’s the perfect destination for any occasion.