The must see mosques in KSA include:
- The Holy Mosque in Mecca
- The Holy Mosque in Madinah
- Masjid Qiblatain Madinah
- Al-Ejabah Mosque in Madinah
- Omer Mosque in Al-Jouf
- Jawatha Mosque in Al-Ahsa
- Al-Adhim Mosque in Al-Ula
Please note that you have to be a Muslim to enter Mecca.