Golestan Palace is a historic royal complex located in Tehran, Iran. It is one of the oldest monuments in the city and showcases a blend of Persian architecture and European influences. The palace was originally built in the 16th century during the Safavid dynasty and later expanded by the Qajar kings. The complex features beautiful gardens, intricate tile work, and stunning mirror decorations. It includes several museums and halls, such as the Shams-ol-Emareh and the Talar-e Aineh. Golestan Palace was designated a UNESCO World Heritage Site in 2013, highlighting its cultural significance and historical value.