Complex sentence: Below North Bridge, an unused dry dock on the west bank marks the former entrance to Queens Dock, and below Drypool Bridge, a muddy basin on the east bank was once the entrance to Drypool Basin and Victoria Dock.
Split into simpler sentences: Below North Bridge, an unused dry dock on the west bank marks the former entrance to Queens Dock. Below Drypool Bridge, a muddy basin on the east bank was once the entrance to Drypool Basin and Victoria Dock.