Located at the confluence of the Tamsui and Keelung rivers, DaLong Cave (Longdong) developed very early. The center of worship here is Bao-an Temple, built in 1825. This is a large temple, and its construction was different; in addition, all of the wood and stone materials—and even the artisans—had to be brought over from mainland China. For these reason, the temple required a full quarter-century to complete.
This temple features the usual dragon pillars, and also a pair of stone lion that are not so usual. Normally, of the two lions (one male, one female) that guard a temple, the male has an open mouth and the female a closed mouth; here, however, both have open mouths. It is said that they are not lions at all but a "humane beast" and a "law beast," stationed there as an appeal to respect the law and carry out good government.