A great way to share travel adventures with friends and family back home, railroad postcards were a popular item in the first quarter of the twentieth century. Common subjects included new railroad bridges and stations (depots), route scenery, luxurious railcar interiors, and even collapses, crashes, and trains getting stuck in various predicaments. Collectors look for strange locations, specific railroads ('roads') and routes, rarity, condition and visual appeal. Railroad postcards are relatively plentiful (since people used to keep them as souvenirs) and can therefore be affordable.