PUERTAS DEL SABER – “DOORS TO KNOWLEDGE” About the Service Trip The St. Mary’s Nicaragua Service trip exists in partnership with Libreria Puertas Del Saber (Community Library “Doors to Knowledge”) in Limon-2 Nicaragua. Puertas Del Saber works in partnership with the Foundation for Sustainable Development (FSD). The relationship was established through Cristy Tono (SMCM Find out more »