https://www.td.gov.hk/tc/transport_in_hong_kong/pedestrians/pedestrian_crossing_facilities/tadep/index.html
21.900364,97.105916
美國夏威夷之旅(一)--Kamakahonu海灘與Hilo希洛城市 Welcome ! &n
24,052KM-3KM=24,049KM