Editing Thousand Islands (section)

===Transportation===
The [[Thousand Islands Bridge]] connects New York State and Ontario by traversing [[Wellesley Island]] at the northernmost point of [[Interstate 81]] in Jefferson County and meets [[Ontario Highway 137|Highway 137]], which leads to [[Ontario Highway 401|Highway 401]]. The waterfront is served by New York State [[New York State Route 12|Routes 12]] and [[New York State Route 37|37]] and by the [[Thousand Islands Parkway]] in Ontario. Ontario also has the [[Waterfront Trail]] alongside the Parkway for cyclists who wish to see the area in an alternative way.

[[Seawaymax]] lake freighters often ply the [[Saint Lawrence Seaway]]. As is usual in inland waters of the United States and Canada, vessels must use [[maritime pilots]] to help them travel safely.<ref>{{cite web |url=http://www.greatlakes-seaway.com/en/business-and-industry/pilotage_authorities.html |title=Business And Industry - Pilotage Authorities |website=Great Lakes St. Lawrence Seaway System |access-date=May 18, 2015 |archive-date=December 31, 2019 |archive-url=https://web.archive.org/web/20191231201541/http://www.greatlakes-seaway.com/en/business-and-industry/pilotage_authorities.html |url-status=dead }}</ref><ref>{{cite book |title=US. Coast Pilot 6 |date=2018 |publisher=NOAA |pages=160}}</ref> In places, a vessel less than {{convert|25|ft}} offshore can find itself in over {{convert|200|ft}} of water. Conversely, rocks and shoals less than {{convert|2|ft|cm|spell=in}} underwater can be found in the center of otherwise deep waters. Due to the great number of rocks and shoals just above or below the water's surface, navigation outside of the marked channels at night can be dangerous.

Before the introduction of the [[zebra mussel]], visibility of only {{convert|10|to|15|ft}} was usual, slightly decreasing as the years passed. Water clarity improved markedly in the mid-1990s with the arrival of zebra mussels, which feed on algae. The water is so clear in some areas a rocky bottom can be observed in {{convert|80|ft}} of water. The area has several shipwrecks, and although most are over {{convert|100|ft}} underwater, some are a mere {{convert|15|ft|m}} down and can be seen from the surface.