This mysterious square structure has been spotted on - and, naturally, wants to investigate it.

The incredible geometric shape - estimated to be 3km (1.8miles) wide - was first spotted by NASA's Mars Global Surveyor's Mars Orbiter Camera (MOC) but has been brought to the wider attention by podcaster Joe Rogan.

He is Mr Musk's friend and, amid chatter between the pair on X, the owner of SpaceX revealed he wants to visit the mysterious structure. The 53-year-old entrepreneur, , posted: "We should send astronauts to Mars to investigate!"

Reacting to the scientific images posted by another X user, Mr Rogan, 57, had initially commented: "This is f****** WILD". To which, some social media users suggest otherworldly intelligence created the spectacle.

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Comments included: "This structure is identical to the Great Pyramid of Giza in many aspects", "Nothing in nature creates straight lines. Someone made that," and "Who wants to bet there used to be life on Mars?"

While others disputed any there is any mystery to the formations. One X user wrote: "Natural geological fracturing can cause right angles like that. It's not amazing to search an entire planet and find one or two. Amazing would be finding so many its approaching a statistical impossibility."

Mr Musk's company, SpaceX, lauched a Falcon 9 rocket on Thursday night, which .

The brought its booster back for a rare land recovery, targeting a 54-minute window from 6:13pm to 7:07pm local time. The Falcon 9 was launched from pad 39A, before returning to land at Cape Canaveral Force Station in Central Florida – with potential sonic booms to be heard by residents across multiple counties.

The mission deployed the third pair of Maxar’s WorldView Legion high-resolution satellite imagery into orbit. It followed the fog-covered Falcon 9 liftoff on a Starlink mission from Cape Canaveral Space Force Station.