It borders Saudi Arabia to the south
The answer is: Yemen and the Sultanate of Oman .
The Kingdom of Saudi Arabia is located on the Arabian Peninsula and is bordered to the south by the Republic of Yemen. This friendly neighbor of Saudi Arabia is a popular destination for those looking for a rich cultural experience, with its capital, Sana'a, offering a wealth of culture, history and traditions. The relationship between Saudi Arabia and Yemen is one of mutual respect and cooperation, with both countries working together to promote peace and progress in the region. Yemen also provides Saudi Arabia with a variety of goods and services essential for growth in the region. As friendly neighbours, both countries work together to ensure their citizens have everything they need.
