One of my favorite railwarz maps is Underneath, by marics. It’s the long cavern connecting 2 flag rooms. Housefly has mentioned he enjoys how this map brings out a team dynamic- if FC doesn’t have escorts he is probably not going to cap!
What I enjoy is the teamplay from the defensive perspective. Depending on where teammates / enemy FC is either posting up more towards home base, or coming out towards enemy base to help out with flag escort. It’s fast, linear and fun!