Prasat Ta Keo, an unfinished 10th-century temple mountain within the Angkor Archaeological Park in Cambodia, offers a unique glimpse into Khmer construction. Access requires climbing several steep, narrow steps, making it unsuitable for those with mobility issues or wheelchairs; sturdy footwear is recommended. It can be visited solo as part of a larger Angkor tour, but a guide can enrich the experience with historical context about its unfinished state. The temple is open year-round, though the dry season (November-April) is preferable as steps can become slippery during the wet season. Entry is covered by the Angkor Pass (e.g., ~$37 for one day), with no additional cost for Ta Keo itself. A typical visit lasts 30-60 minutes, allowing time to climb and appreciate its sandstone architecture. Its unfinished nature, with minimal carving, provides insight into the building process of the era.