Uzunyuva Mausoleum and Museum Complex is situated in the Milas district of Mugla Province in Turkey. The Mausoleum belonged to Hecatomnus, the father of Mausolos and the local ruler of the Ancient City of Mylasa. The grave was founded in 2010 on the eastern slope of Hisarbasi Hill and is considered the most significant discovery in Milas for the last 100 years. It is the early version and inspiration of the Mausoleum at Halicarnassus, which is considered one of the seven wonders of the world. The Mausoleum of Hecatomnus' has the same architectural features as the Mausoleum at Halicarnassus, and when we consider its size, nature, and surrounding descriptions, it is one of its kind. In 2014, a 121-line poem was found in the inscriptions around the tomb. The poem was written to the ruler and is thought to be the longest in classical antiquity. It was inscribed on the Unesco World Heritage List in 2012.