Complex sentence: Bocagrande is known in Cartagena for having the most important Hotels of The City, It's one of the most expensive neighborhoods in the country, and is the most expensive and exclusive one in the entire zone.
Split into simpler sentences: Bocagrande is known in Cartagena for having the most important hotels of the city. It is one of the most expensive neighborhoods in the country, and is the most expensive and exclusive in the entire zone.