I spent a 4-hour layover at the massive Qatar Airways Flagship business class lounge in Doha, which sprawls across 2.5 acres and has a reflection pool. Here's what it's like.

Jimmy Im for Business Insider

• The business class lounge at Doha International Airport in Doha, Qatar, sprawls across a whopping two-and-a-half acres.
• The space is replete with plenty of seating, showers, two restaurants, and a reflection pool.
• I recently spent a four-hour layover there - here's what it was like.
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Qatar Airways sets a standard in aviation. Not only is it ranked the No. 1 airline in the world by Skytrax, the award-winning airline also offers the No. 1 business-class cabin.

And while Qatar offers a level of luxury in the sky, it's hardly any different on the ground. I recently experienced its famed Al Mourjan Business Class Lounge at Doha International Airport in Doha, Qatar over the course of a four-hour layover.

The two-and-a-half-acre business class lounge sprawls across a third-floor sanctuary with two restaurants, a reflection pool, a game room, business center, showers, and quiet sleeping areas.

And there's more to come. Qatar recently announced the opening of the world's largest airport lounge, expanding Al Mourjan with a gym, spa facilities, additional restaurants, and a lush, 107,000-square-foot indoor tropical garden as the center piece. Qatar is expected to open the lounge in 2022, the year it hosts the FIFA World Cup.

For now, take a look at Qatar Airways' Al Mourjan Business Class Lounge.