Many complained about having to walk nearly two kilometers from the ticket booth to reach the main gate.
The administration seems to be unprepared for handling a large number of visitors. There are not enough buses to transport them though Dai Nam is a large area involving long distances, visitors said.
They had to queue for food, which is poor but is sold at unreasonable prices.
There is a shortage of shaded areas to rest and signs indicating routes, they said.
Unfinished and slipshod work mars the landscape, rubble and rubbish are strewn everywhere, and roads are flooded, they said.
The 450-hectare Dai Nam tourist area, which opened in 2007 in Thu Dau Mot town, has a zoo, mountains, a pagoda, and beaches.