Trang An – The cultural and natural heritage of the world
Lots of concrete structures are being built all over the place and rice paddies are disappearing fast but hopefully, this area will not lose its splendor. The site was mainly built for Vietnamese and Chinese tourists. However, you are much less likely to be bothered by vendors selling beverages and hand embroidered gifts.
As with Tam Coc it is best to go early in the morning or in late afternoon (last boat is 4 pm) to avoid the buses of tour groups coming from Hanoi. The ride takes about 3 hours with a short couple stops to visit some temples. Each boat leaves with 4 people but will leave with more or fewer depending on the demand. 15,000 parking fee for bikes, but you could park them near some restaurants just next to the parking if you are willing to take a little risk 150,000 per person.
Source: Wiki Travel