These two guys Trong and Trung are great guys and put on an unique tour. There English is brilliant and they give you plenty of local knowledge about the area. I couldn’t name all of the locations they shown me but there all great. Including the marble mountains, monkey mountain, a water fall (that comes all the way from Laos) coconut island and the hai van pass. The highlight of the day for me was the Hai van pass, around Da Nang. One of the best coastal roads in the world and a sight that you won’t forget. All the time your crushing on the back of there bike with very considerate driving and taking in all of these sights. Would highly recommend them for a day tour, better than the normal bus tour guides