The hutongs are the historic heart of old Beijing. Join us on this self-guided GPS audio walk from the Drum Tower to the Tibetan Buddhist Lama Temple, through a winding labyrinth of alleyways and local color that takes you to some of Beijing’s most ancient landmarks.IMPORTANT: There is a GPS offset in China, and as a result your position on Google and Apple maps will be incorrect. This issue doesn’t affect the offline map, so after you’ve downloaded all the audio files, but before you hit start, switch to ‘airplane mode’ (or turn off data) and you’ll be able to track your position correctly.The tour starts at the south side of the Drum Tower. If you’re taking the subway, get out at Exit C of Shichahai Station on line 8, turn right and walk up. You can also take a taxi to “Gulou” and you’ll end up at the same spot.The audio plays automatically at exactly the right time and place using your smartphone’s GPS and the VoiceMap mobile app, which also works offline.