Located at the southern ex-treme of the Ilan coast, the Atayal community of Piyahaw in Nanao on the alluvial plain of the Peihsi is one of only two aboriginal communities in Ilan.
位於宜蘭海岸線最南端、南澳北溪沖積平原上的泰雅部落──碧候，是宜蘭縣僅有的二個原住民村落之一。