Bihar is a fascinating tourism destination and is known for its monuments and relics dating from the ancient to medieval times. Some treasures worth visiting in the state are the Tomb of Sher Shah Suri, Barabar Caves- one of the oldest rock-cut caves, Vikramshila Monastery, Buddha Smriti Park, ruins of the ancient city of Vaishali, Bodhi Tree, and the Mahabodhi Temple. Takht Sri Patna Sahib, built by Maharaja Ranjit Singh in honor of Guru Gobind Singh Ji who was born in Patna.