Hoang Xuan Vinh has ended Vietnam's six-decade wait for a first Olympic gold medal.
Robbery, traffic and sanitation are among things that put them off from returning for a second visit.
The waste is carried in the same sewer system for storm water, which empties into the sea.
At the moment all restaurants, cafes and nightclubs have to close at the midnight hour.
Chance of foreign ownership cap removals is boosting interest.
The elephant population in Vietnam is small and particularly at risk.