Hot answers tagged walking
What about the Chilterns (http://en.wikipedia.org/wiki/Chiltern_Hills) Relatively near, though not very high
As you say it is rather flat around there. So you will be quite hard pressed to find any significant hills that close to you. The most obvious area that comes to mind is the Chilterns. Although, that is still a good 2 hour drive so probably too far. Various websites provide possible hikes for a given location. If you look through some of these you may find ...
For certain contaminants such as Giardia, it doesn't matter whether the water is running fast or slow. You will get infected regardless. So this idea about "fast water" is a myth that is not correct. If you are drinking close to the source of streams and there is not any mining activity or industrial pollution nearby, then OF COURSE you are drinking clean ...
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