"Café Cuatro Sombras, San Juan by Ana Jovane Serrano. Cuatro Sombras offers the best Puerto Rican coffee. Their coffee comes from the Yauco mountains and is freshly ground in the coffee shop. With free wi-fi and a cozy atmosphere this place is a favorite of locals. In addition to great coffee they offer yummy sandwiches and toasts.Try pairing their delicious warm toast and guava butter with a cup of coffee."