the Great WallConsistently the top recommendation for visitors, and worth allowing a half day rather than squeezing it between other stops.
Local culture beyond the checklistthe Temple of Heaven and Beijing's hutong alleys are where Beijing feels least like a tourist itinerary and most like the actual city.
A well-known second stop: Tiananmen SquareRounds out a first visit nicely alongside the bigger-name sights.
Easy onward travelBeijing's transport connections make it simple to extend the trip into the rest of China if you have the time.