What is claimed to be the “shortest international railway” runs for a few metres between Nové Údolí in the Czech Republic and the other side of the now-open border with Germany.
The standard gauge line is on the alignment of a former railway which was fatally severed by the events of the 20th century. Not far away is a small railway museum in an old wagon, and also a rebuilt section of iron curtain.
The international line is operated using a push-along trolley made to look like a steam loco, complete with smoke. Unfortunately it only carries children, so I couldn’t ride on it when I visted on 3 August 2019; I did ask!