Vikings used the Russian waterways to get to the Black Sea and Caspian Sea. Parts of these routes can still be used. Check possible need for special permits, which may be difficult to get.
维京人利用俄罗斯水路到达黑海和里海。其中一些路线至今仍可通行。确认一下是否需要特殊许可证，这些许可证可能很难申请。