These two games in one box are staples in the 18xx genre. Both games are about starting, investing in, and operating railroad companies. What makes 1861 and 1867 unique is that they are largely about starting small companies which can merge together to form larger railway systems.

Both titles are great for beginners as well as experienced players and can be played by experienced players in 3 to 4 hours (though your first games will likely be longer).