Get lost and explore new places - Beijing
Try to get on a bus aroud the 900 something numbers, they are at Dongzhimen subway station as well - or even better, just hop on ANY one with a number and take it to the end of their line. If you can't understand chinese like me, just wait until everybody's off the bus, you're the last one and then they will gesture you to get off wherever the end of their line is - just have fun.
Try to take extra water and snacks - you may have to walk a great distance to the bus stop that goes back in the opposite direction, or if you are panicking- just get to the nearest railway station to get back on your own track :). There are some places in this city that you'll seldom find again if not lost.