Our  stopover on our way back to Sydney ... I can't imagine our travels have taken us in the Persian Gulf ... We were here sometime April 2019. Huge Airport and a very impressive architectural style ...

From Wikipedia :

Hamad International Airport (IATA: DOH, ICAO: OTHH) (Arabic: مطار حمد الدولي‎, Maṭār Ḥamad al-Duwalī) is the sole international airport in the state of Qatar. Located south of its capital, Doha, it replaced the former Doha International Airport as Qatar's principal airport. Formerly known as New Doha International Airport (NDIA), Hamad International Airport was originally scheduled to open in 2009, but after a series of costly delays, the airport finally opened on 30 April 2014 with a ceremonial Qatar Airways flight landing from nearby Doha International. National carrier Qatar Airways and all other carriers formally relocated to the new airport on 27 May 2014...

https://en.wikipedia.org/wiki/Hamad_International_Airport