I have a couple of weeks to play with in August. Just me. Around £600 in the budget but could squeeze more for the right thing. This country or abroad. I'd like to do something that boosts my fitness but not a residential boot camp as I'm doing one of those later in the year with friends. Any ideas? I like the idea of a walking holiday but I'm not good with map reading and guided walks seem very expensive and I'd have to spend hours making small talk with random strangers! Thanks for any ideas.