777 NE M L King Blvd (btwn NE Holladay St & NE Lloyd Blvd), 포틀랜드, OR
컨벤션 센터 · 31개의 팁과 리뷰
HISTORY: Opened in 1990, it houses the world's largest Foucault Pendulum. It has become known for upward illuminating the twin spires yearly on September 11th in memorial of the events of 9/11.