Introduction to the ancient well: Between the Tanah Lot Temple and Wenchang Pavilion, there is a half-moon-shaped well - Hongmao Well. It is said that it existed when the Dutch built the city of Prominzha. It is said that there is a tunnel under Hongmao Well that leads to Anping Relanze City (i.e. Anping Castle) four kilometers away. When Zheng Chenggong entered the city and besieged it, the Dutch used this secret tunnel to escape to Anping. But at that time, the two cities were separated by the Taijiang River and the inland sea, so although there were constant rumors, exploration has not yet been successful.