Just came across this very stim­u­lat­ing and fun Trav­el­er IQ inter­ac­tive game…enjoy! Link: Trav­el­er IQ Challenge Note: at the bot­tom of the page you can select a vari­ety of chal­lenges (flags of the world, UNESCO sites, North Amer­i­ca…) My favourite: Pho­tos of the World.