777 NE M L King Blvd (btwn NE Holladay St & NE Lloyd Blvd), พอร์ตแลนด์, OR
ศูนย์ประชุม · 31 คำแนะนำและคำวิจารณ์
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.