Ancient CivilizationsWorld’s Oldest Seafaring Boats Built in Southeast Asia 40,000 Years Ago Posted on February 26, 2025 by Administrator The ancient peoples of the Philippines and of Island Southeast Asia (ISEA) may have built sophisticated boats and mastered seafaring tens of thousands of years ago—millennia before Magellan, Zheng He, and even the Polynesians were able to match their feats.