the only places I've done that were between countries with very special travel relationships, e.g. schengen. you can travel those countries without a passport and often no border check at all, it's not the same as uk-netherlands
Pre-Ukraine situation there used to be a train between Helsinki (Finland) and St Petersburg (Russia) that did this: border checks on a high-speed train. Definitely some of the more serious checks and visa requirements on that border as well.
that's my question, where?
the only places I've done that were between countries with very special travel relationships, e.g. schengen. you can travel those countries without a passport and often no border check at all, it's not the same as uk-netherlands