Abu Dhabi and Dubai have some of the most luxurious resorts in the Gulf. March, April and October are the best months to visit as it is not too hot on the beach. Abu Dhabi is a modern oil-rich emirate. The Sheikh Zayed Mosque of Abu Dhabi is a harmonious blend of modern and traditional architecture. Al-Bidyah Mosque in Fujairah is the oldest mosque in the UAE and an important historical site. The Sarjah Arts Museum is home to art works by renowned Arab artists. Sharjah Museum of Islamic Civilization features various manuscripts and religious documents. The tiny emirates of Ajman and Umm Al Quwain are also worth visiting to grasp glimpses of traditional tribal life.