I have hundreds of board games, but I hate the 'classics' such as Monopoly that just go on for hours and cause loads of arguments.
Ticket to Ride is *the* best family board game there is: 2-5 players, 8 years and up, plays in under an hour, five minutes to learn the rules. It's really quick to play, and even non-gamers enjoy it. Every one of our friends and family that we've introduced this game to have gone out and bought a copy for themselves. I cannot recommend it highly enough.
Anyway, the usual RRP is £34.99 and Amazon have it for £24.44 - Bargain!
With elegantly simple gameplay, Ticket to Ride can be learned in 3 minutes, yet players face strategic and tactical decisions that vary with every turn. Players collect cards of various types of train cars that are then used to claim railway routes connecting various cities across a map of North America. The longer the routes, the more points they earn. Additional points come to those who can fulfill Destination Tickets - goal cards that connect two distant cities; and also to the player who builds the longest continuous route.