[awaken]

Latvian route Zilupe 3.3. is probably the best in terms of scenery details.
but frame rate on stations may drop significantly... not for low-end computers
It is part of single-track busy mainline , connecting Riga and Moscow.
In real life, it plays big part in economics as on of the "oil routes" crucial for transit from Russia to Baltic sea ports.
Line operated by Latvian and Russian locomotives: 2TE116, 2TE10M, 2TE10U, M62, 2M62, TEP70 (for international passenger trains), DR1-A (regional and commuter passenger trains)