Complex sentence: This island is an attractive tourist destination since it only takes 10-15 minutes to get to Sherkin from Baltimore, where as a journey to the neighbouring Gaeltacht island Cape Clear would on average take 40 minutes.
Split into simpler sentences: This island is an attractive tourist destination and it takes just 10-15 minutes to get to Sherkin from Baltimore. The journey to the neighbouring Gaeltacht island Cape Clear takes on average approximately 40 minutes.