People walk along a tow path by the canal in Birmingham, West Midlands, England, United Kingdom, Europe

Elevated view of the Old Tow, UNESCO World Heritage Site, with cable car, Dubrovnik, Croatia, Europe

Sailing boat on the Norfolk Broads, United Kingdom

Sailing boat on the Norfolk Broads, United Kingdom

Sunrise over sailing boats on Lake Windermere in Ambleside, Lake District, UK.

RNLI inshore rescue boat demonstration rescue, Little Haven Summer Regatta, Pembrokeshire, Wales, UK, Europe

RNLI inshore rescue boat demonstration rescue, Little Haven Summer Regatta, Pembrokeshire, Wales, UK, Europe

Aerial of tug boat towing battleship out of loch, naval harbour at Wilhelmshaven, Lower Saxony, Germany

Aerial view of a freighter being towed into the harbour, Bremerhaven, northern Germany

The dutch steamboat "Nordzee"

Tow boats, near Vancouver, British Columbia