Complex sentence: It flows through deep gorges across the Catalan Pre-Coastal Range and then close to Santes Creus and, finally, into the Mediterranean at the Tamarit Castle, Tarragonès, near Altafulla forming a coastal lagoon separated from the sea by a sandbar.
Split into simpler sentences: It flows through deep gorges across the Catalan Pre-Coastal Range and then close to Santes Creus. Finally it flows into the Mediterranean at the Tamarit Castle, Tarragonès, near Altafulla forming a coastal lagoon separated from the sea by a sandbar.