This document provides case studies of four eco-innovative hotels in Italy and Sri Lanka. Case study one describes Gallo Senone in Italy, which achieved Clima Hotel certification for its energy efficiency and use of local materials. Case study two profiles Airone Country House in Italy, which gained EU Ecolabel and EcoWorldHotel membership for its environmental commitments. Case study three examines Vigilius Mountain Resort in Italy, built with natural materials and awarded for sustainability. Case study four looks at Jetwing Vil Uyana in Sri Lanka, constructed using natural rushes and fibers to fuse with nature without need for artificial cooling. The case studies highlight best practices in product/service innovation, processes, and marketing related to energy