Rising to prominence after the fall of Anuradhapura, Polonnaruwa represents the medieval golden age of Sri Lankan art and architecture. This compact archaeological park is best explored by bicycle, allowing you to breeze between the monumental Gal Vihara—where four massive Buddha figures are carved into a single granite cliff—and the soaring walls of the ancient Royal Palace. The city’s “Sea of Parakrama,” a man-made reservoir of staggering scale, proves that the ancient kings were as much master engineers as they were patrons of the arts. Here, the ruins are remarkably well-preserved, offering a vivid window into a time of kings, trade, and architectural brilliance.