The road from Peitou to Yangmingshan passes the Takuangtsui hot spring area. To the east is the Lungfengku hot spring area, which is rich in sulfur minerals. Sulfur is the main ingredient of gunpowder, and during the Ming dynasty merchants traded with the plains aboriginals, exchanging agate, and bracelets for sulfur. Later, during the Qing dynasty, the mining of sulfur was an important commercial activity here.
從北投上陽投公路，經過大磺嘴溫泉區，東側是龍鳳谷溫泉，藏著數量龐大的硫磺礦，硫磺是製造火藥的主要原料，明代即有商人以瑪瑙珠、手鐲和當地平埔人交換。