Ashizuri Underwater Observation Tower.

The Ashizuri Underwater Observation Tower, nestled in Kochi Prefecture's Ashizuri-Uwakai National Park, combines innovative architecture with unique marine observation. Designed in 1971 by Yoshikatsu Tsuboi, this iconic red and white cross-shaped tower features two observation levels: one high above the waves and another 7 meters below sea level, accessible by a spiral staircase. Visitors can marvel at diverse marine life through large porthole windows, witnessing colorful corals, tropical fish, and even sea turtles in their natural habitat. Surrounded by stunning rock formations and the region's warm currents, the tower offers scenic views and an immersive experience. Glass-bottom boat cruises provide an alternative way to explore the vibrant ecosystem, ensuring an unforgettable adventure for ocean enthusiasts.