A massive database where you can find "inside train" or "passenger carriage" recordings. Most are high-fidelity WAV or MP3 files uploaded by field recordists. You can browse thousands of options on Freesound.org.
The classic sound of a metal spoon hitting a glass tea cup in a silver holder (podstakannik). skachat zvuk poezda v vagone
The gold standard for long-form train audio. Look for "ASMR Train Ride" or "Train Cabin 10 Hours." Many videos feature 4K visuals of rain on the window or snowy landscapes to match the audio. A massive database where you can find "inside