Hi all - I'm looking to do a long walk - probably 20-25 miles - through Hong Kong and/or Seoul that would give me a good overview of the city & hopefully have some sort of hook to it. For reference, I walked all 20 arrondissements of Paris, between the Seven Sisters Cemeteries in London, all of Broadway in New York, and between the Seven Hills of Rome. Any suggestions along those lines? Ideas for other big cities welcome as well, I'm just going to Hong Kong & Seoul next.