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This part of Tailuge (Taroko) Gorge is composed of marble cliff faces covered with small holes, the result of long-term erosion by river and ground water. House swifts and Pacific swallows often forage and nest here, giving the place its name.
（Traffic information is subject to change. Please check with the transportation station before departure.）
** The Central Cross-Island Highway (Guguan to Deji Section) is currently closed for repairs.
Nat'l Hwy 5 → Exit at the Su-ao Interchange → Prov. Hwy 9 → Prov. Hwy 8
Air: 1. From Taipei International Airport fly to Hualien on TransAsia Airways. 2. From Kaohsiung International Airport fly to Hualien on Mandarin Airlines. Hualien Airport
Train: 1. Take a train to Xincheng Railway Station, continue by rental car to Swallow Grotto (Yanzikou). 2. Take a train to Hualien Railway Station, continue by Hualien Bus (New Hualien Station-Tianxiang Line) to Swallow Grotto (Yanzikou) stop.