Prasat Ta Keo, located in the Angkor region of Cambodia, is an unfinished temple mountain constructed in the late 10th-early 11th century, known for its imposing sandstone structure and lack of carvings. Accessibility can be challenging due to the steep steps. Exploring solo is possible, but a local guide can provide historical context. There are no significant seasonal restrictions, though the dry season (November to April) is generally more comfortable for visiting. Expect to spend 1-2 hours exploring the site. The cost is included within the Angkor Archaeological Park pass, which varies in price depending on the number of days you purchase. Due to the unfinished nature of the temple, be prepared for a more raw and less ornate experience compared to other Angkor temples.