The 2nd largest city in north central province. But it is known as one of the cleaner and more beautiful cities in the country. The green environment, amazing ancient constructions, Parakrama Samudraya (a huge tank built in 1200 A.C.), attractive tourist hotels and most importantly nice people with hospitality, always attracted local and foreign tourists. One recent scientific observation is that of its climate changes. Historically Polonnaruwa had a tropical climate most of the year, although it was occasionally chilly in December and January. But in recent years the rain and chillness has been increased noticeably. Although this is surprising to some people, it is more enjoyable for tourists.