 Later a large number of resorts sprang up along the coast and numerous islands, offering services ranging from mass tourism to catering and various niche markets, the most significant being nautical tourism, as there are numerous marinas with more than 16 thousand berths, cultural tourism relying on appeal of medieval coastal cities and numerous cultural events taking place during the summer.Inland areas offer mountain resorts, agrotourism and spas.Zagreb is also a significant tourist destination, rivalling major coastal cities and resorts.