For a project of mine, I would like to cycle from France to England and from Denmark to Sweden.
In case of France to England I think it is definitively not possible to cycle through the tunnel. But are there any other feasible ways for an averaged-trained person with no special skills to cross the sea there by human power only? Swimming for example is not an option, since it would need superior skills and stamina.
In case of Denmark to Sweden, it's definitively possible. In the worst case, one would need to travel all the way through Russia, but it's doable. But there is also the Oresund bridge. Can I cycle there? If not, maybe walk?