MAPSTA.NET is a growing collection of useful maps or links to maps from various countries, especially hard-to-find maps:
Public Transport Maps
Public transport maps from non-English-speaking countries often don’t appear in your search engine results because they are indexed in the local language. Mapsta.net provides quick links to some of these maps – as well as a few UK maps that we’ve found useful or especially good. See the menu of regions at the top of this page, and click a country from the drop-down list within each region.
Ordnance Survey maps (Britain)
Some maps of footpaths, bridleways, and other rights of way in areas of Britain such as Dartmoor National Park in Devon, Gower in Wales, and West Oxfordshire are listed on the UK – OS maps page. View these 1:50000 scale ordnance survey Landranger maps free in full screen mode online, and/or buy the folding paper versions through the links provided.