The Sultan Qaboos Grand Mosque in Muscat is a breathtaking architectural marvel and a must-see landmark. It's generally accessible to visitors, with specific visiting hours that should be checked in advance. Dress modestly, covering shoulders and knees. While solo visits are perfectly feasible and allow for independent exploration, guided tours can provide deeper insights into the mosque's design and cultural significance. Consider visiting during the cooler months (October to April) to avoid the intense Omani heat. The visit typically lasts 2-3 hours, and while entry is free, donations are welcome. Remember to be respectful of the religious environment.