- One of Sri Lanka’s Oldest Reservoirs: Tissa Wewa is one of Sri Lanka’s oldest irrigation reservoirs. It is traditionally attributed to King Devanampiya Tissa. However, some scholars believe it dates back to an even earlier period.
- Ancient Engineering Marvel: The reservoir is a testament to ancient Sri Lankan engineering. Its impressive embankment is over 3.3 km long and 7.6 meters high. This structure has survived for over 1,100 years.
- Historically Significant Water Source: Tissa Wewa was vital for both irrigation and royal use. It supplied water to the capital city of Anuradhapura. It also supplied the royal pleasure gardens of Ranmasu Uyana.
- Sophisticated Water Network: The reservoir is a part of an advanced hydraulic system. It receives water from the ancient Jaya Ganga canal. Then, it releases excess water into the Malwathu Oya River.
- Enduring Legacy of Construction: The embankment remains in its original state. It has required minimal maintenance over centuries. It still supplies water to Anuradhapura today.