Commewijne begins just across the Suriname River from Paramaribo, but its pace is immediately more rural. Rivers, canals, former coffee and sugar estates, Javanese communities, and strips of secondary forest make it Suriname's easiest day outside the capital.
The standard river outing looks for Guiana dolphins near the confluence, then stops at Fort Nieuw Amsterdam and one or more plantation sites. Dolphin sightings are possible, not promised. A guide who treats the plantations as places of slavery and indentured labour rather than pretty old estates is worth seeking out.
Peperpot Nature Park is the best independent stop: an old coffee and cacao plantation where forest has returned around canals and paths. Museum Bakkie, farther downriver at former plantation Reynsdorp, rewards advance planning with a rare personal collection on the district's history. By bicycle or car you can combine Peperpot with Nieuw Amsterdam; Bakkie needs a separately arranged river journey.