The Tweed River traces a 90-kilometre arc from the Tweed Range to the Coral Sea, carving through Gondwanan rainforest remnants that predate the continent's separation from Antarctica. Its lower reaches form a tidal estuary system where brackish mangrove corridors meet freshwater tributaries, creating habitat mosaics that support over 170 recorded bird species and populations of eastern water dragons, swamp wallabies, and the threatened green sea turtle. Colonial cedar-getters navigated these waterways in the 1840s, floating Toona ciliata logs downstream to sawmills at Tumbulgum and Condong, an industry that stripped the valley of its giant trees within fifty years. Today the riverbanks protect regenerating subtropical lowland forest classified under the Gondwana Rainforest World Heritage Area, with stands of piccabeen palm, sandpaper fig, and strangler vines forming a canopy visible from the water. Tweed river cruises with lunch depart from River Terrace, a 1920s ferry wharf repurposed as a commercial dock after the Pacific Motorway diverted road traffic inland. Vessels follow the main channel past Ukerebagh Island Nature Reserve, a 24-hectare mangrove sanctuary where boardwalks thread through grey mangrove and river mangrove stands, then enter narrow tributaries flanked by buttressed roots and hanging lawyer vines. The cruise route penetrates seven kilometres upstream, passing beneath the Tweed Valley Way bridge and into the Cudgen Creek junction, where the river's gradient drops to near-zero and tidal influence governs water flow twice daily. Onboard commentary identifies white-bellied sea eagles, pied cormorants, and azure kingfishers, species whose presence reflects the estuary's intact food webs and low sedimentation levels compared to neighbouring catchments. Lunch service aboard rainforest discovery cruises typically features local prawns from the Tweed trawler fleet, Tweed Valley beef, and produce from the Murwillumbah hinterland, served on enclosed decks with retractable canopies. Morning canal cruises focus on residential waterways rather than forested tributaries, tracing the Terranora Inlet and Twin Towns canal network where 1960s dredging converted wetlands into suburban finger canals. The operational base at 4 River Terrace maintains a fleet of vessels ranging from 30-seat aluminium catamarans to 80-passenger pontoon boats, each fitted with shade structures and commentary systems. Departures run daily from 09:00 to 16:00, with boarding commencing thirty minutes prior to cast-off.