A riverboat is a watercraft designed for inland navigation on lakes, rivers, and artificial waterways. There are a number of rivers, canals and other navigable waterways in Kyoto. Towns were located on or near the coasts or navigable inland waterways. There are also beaches along many of the Gold Coast's of navigable tidal waterways. Those that breed on inland waterways may migrate to sea coast. Canals that artificially link many European waterways facilitated their early dispersal. The Timucuan Preserve is a U.S. National Preserve comprising over of wetlands and waterways. Commerce was aided by the expansion of roads and inland waterways. This largely confined it to vessels built for inland waterways. The harlequin duck is a colorful species of waterfowl found in the lakes and waterways. The park's moose tend to stay near waterways and wetlands. Plastic pollution can afflict land, waterways and oceans. The Democratic Republic of Congo has thousands of kilometres of navigable waterways. Since that period, most of these waterways and wetlands have been drained or filled. Weeds invade natural landscapes, waterways, and agricultural land.