Railway loop in Telgart, Slovakia. Hit "View map" to see and understand Telgart loop.
Trains enter the loop at the bottom right (small lighted station called "Telgart Penzion"), enter the tunnel, continue on the made ground and left it on "Telgartsky viaduct", visible right above the station. Whole loop is 2300 meters long and the difference in altitude between the beginning and the end is 31 meters. It was build in 1934.