Southend-on-Sea, England pairs classic seaside character with big-sky estuary walking. Set out from Garon Park on the Southend Millennium Loop, trace the shoreline toward Paglesham Eastend, or link west toward Hadleigh Country Park and the marshes of the Thames Estuary. Between the pier town bustle and quieter creeks, this corner of Essex offers long, level miles with shifting water views and open coastal light.