Spain! Spain has great country side roaming. You can visit the deserts very well know westerns were filmed on. Run up on one of the highest peaks of the EU. Eco tourism here is great.

Not carbs in specific. But muscle along fat is very quick on the cut list of things your body does away with when having deficiencys. Just look at people doing hunger strikes

The body eats up muscle as the first response to being deprived of substance.

Also, you can just work either double the time or half each.