Back in the early 90's while backpacking around South America, I took a 30 hour train trip from Punta Natales to Santiago (Chile).
The train was straight out of the golden era of train travel. There were ornate iron gates between the carriages. A proper dining carriage. Old brass fittings. A night the stewards came along and disassembled the seats, created bunk beds from them and hung curtains.
It was a fantastic journey just like the train from murder on the orient express, just no murder.