The Round Pond, or Kerek tó as Hungarians call it, is located in the middle of Jászszentlászló. Its existence dates back almost 100 years. The saline lake here was once one of the favourite bathing places of the locals, and during this period the water of the Round Pond was still a qualified medicinal water. Nowadays, the intermittent shallow water area that has remained has become a favourite habitat for birds. In 2019, thanks to a successful tender, the municipality developed a study trail coming from the main street. The educational trail, which also has information boards, was named after a plant called helleborine, and the boards are meant to educate on the flora and history of the pond. The popular walkway through a forest by the pond ends in a clearing where a leisure park has been set up.