Dolomite mountains, an area you can enjoy and explore in a myriad of ways. Activities in and around San Cassiano in the summer include biking, e-Biking, climbing, adventure parks, nature walks or guided hikes for all levels, families included. Dolomite mountains, an area you can enjoy and explore in a myriad of ways. Activities in and around San Cassiano in the summer include biking, e-Biking, climbing, adventure parks, nature walks or guided hikes for all levels, families included.