The top 5 must-see temples for a one day tour, in order of priority, are: 1. Angkor Wat - The iconic, largest temple complex at Angkor 2. Bayon Temple - Located within Angkor Thom, known for giant smiling stone faces 3. Ta Prohm - Photogenic jungle temple made famous by Tomb Raider 4. Banteay Srei - Intricately carved pink sandstone Hindu temple 5. Preah Khan - Sprawling temple where Buddhism and Hinduism fuse