This document discusses geotourism and its potential as a tool for sustainable regional development. It defines geotourism as tourism focused on geology and landforms that also connects to the biotic (plants and animals) and cultural environments. Key components of geotourism include geological attractions, appropriate interpretation of the geology's form, process and age, and connection to other environments. Geoparks are areas that promote geotourism through education, science, culture and sustainable development. Iceland is provided as a case study where geotourism supports the economy through visitor centers, tours and local businesses. In conclusion, geotourism can form the basis for holistic environmental tourism and sustainable regional economic development.