| Lim(noun, territory, area, europe) |
| Lindisfarne & Budle Bay(expression, territory, europe, england) |
| Little Narragansett Bay(expression, territory, area, america, connecticut) |
| Little Quilcene Estuary(expression, territory, area, water, washington) |
| Long Island Sound(expression, feature, territory, area, newyork) |
| Los Penasquitos Lagoon(expression, territory, area, water, california) |
| Lough Foyle(expression, territory, area, europe) |
| Lymington Estuary(expression, territory, europe, england) |
| Maplin Sands(expression, territory, europe, england) |
| Medina River(expression, territory, europe, england) |
| Medway Estuary(expression, territory, europe, england) |
| Mersey Estuary(expression, territory, europe, england) |
| Mink River(expression, territory, area, water, wisconsin) |
| Mission Bay(expression, territory, area, water, california) |
| Mitchell River(expression, territory, area, water, massachusetts) |
| Mobile-Tensaw River Delta(expression, territory, area, water, alabama) |
| Morecambe Bay(expression, territory, europe, england) |
| Mount Hope Bay(expression, territory, area, america, massachusetts) |
| Mugu Lagoon(expression, territory, area, water, california) |
| Mystic River(expression, territory, area, water, connecticut) |