The largest glacial lake in Romania , Bucura Lake ( lacul Bucura ) is in these mountains . It covers 8.9 h and is located at an altitude of 2030 m metres . The Retezat Mountains have many glacial lakes , including the largest glacial lake in Romania , Bucura Lake ( Lacul Bucura ) , which covers 8.9 ha and is situated at an altitude of 2030 metres .