The Mubarak Mosque, where children study the Koran in Arabic script, is also on the river bank opposite Chau Doc. Visitors are permitted, but you should avoid entering during the calls to prayer (five times daily) unless you are a Muslim.
There are other small mosques in the Chau Doc area. They are accessible by boat, but you’ll need a local guide to find them all.
Address: Chau Giang on river bank, opposite Chau Doc