Question: what are the major physical features of the arabian peninsula?
Answer: Mountains. Stretches of dry or marshy coastland with coral reefs on the Red Sea side (Tihamah) Oases and marshy coast-land in Eastern Arabia on the Persian Gulf side, the most important of which are those of Al Ain (in the UAE, on the border with Oman) and Al-Hasa (in Saudi Arabia), according to one author.