From Bai Chay, visitors can hire a boat and go out to the bay. It is here that visitors will be find some of Southeast Asias most fascinating sites. Visitors to the bay speak highly of its almost mystical qualities and the surrealistic scenery that defines this bay. The limestone formations are both bizarre and awesome. Over thousands of years the base of many of the formation have corroded to a point where many seem to be balancing on thin air. The shapes and the positioning of these formations often resemble people, animals etc., hence, most are given a name by the locals. Some of the more famous are: Hang Dau Go ( Wooden Stakes cave), Hang Bo Nau (Pelican cave), Hang Trinh Nu (the Virgin), Hang Sung Sot (Cave of Awe), Dong Hang Hanh, Dao Tuan Chau (Sentinel Chau Island), Qua Chuong (the bell), Con Voi (the elephant) etc.. Now, about one thousand formations have names. One can't possibly see all of Ha Long grandeur in one day or even a month since depending on the time of the year, the weather, or the condition of the bay the visitor may see only one small aspect of Ha Long's beauty.