Also known as the Grand Mosque, the Sheikh Mosque is arguably one of Abu Dhabi's most famous attractions, and a for a very good reason. It is simply stunning with 82 intricate detailed domes, reflective pools in the courtyards, and white marble walls and is widely considered to be one of the most beautiful places of worship in the world. The interior can fit a whopping 40,000 people and houses the third largest chandelier, covered in Swarovski crystals along with the world's largest carpet. Keep in mind, as this is the place of worship, dressing appropriately is a must. The mosque is open to the public daily from 9 am to 10 pm except on Fridays. The mosque is free to all visitors, so keep in mind, that it can get pretty crowded come mid-day.