The geology of Oman is spectacular for both tourists and geologists. Exceptionally well-exposed rocks offer a fascinating outcrop experience that is second to none. The scenery is unique and often breathtaking. The Samail Ophiolite, which is a former sea floor you can walk on, along with mountain ranges exceeding 3000 meters in altitude and deeply incised canyons featuring turquoise-colored perennial streams, contrasts with dry but golden sand deserts. Coastal areas with kilometers of white beaches are waiting to be discovered. This geological guidebook has two parts: the first provides a general introduction to the geology of Oman and helps the reader understand the variety of geological phenomena and observations in a scientific context. The authors emphasize describing the processes that led to the formation of Oman's rocks and landscapes over millennia of Earth history.