Be careful: spoilers on "Game of Thrones" [VIDEO] season 7 will follow! As soon as HBO released the "GOT" season 7 official trailer, a lot of fans started to wonder about the impressive, rocky throne on which Daenerys is sitting in the video preview. Below you can find all the explanation you need about the mysterious location.

'Game of Thrones' season 7 trailer: let's watch it again

Before starting to analyze the scene, here's the official video preview released by HBO a few days ago, which has been viewed over 60 million times in the first 24 hours.

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Daenerys is in the original seat of House Targaryen in Westeros

The rocky throne is inside Dragonstone, a castle located on a small island that was the seat of House Targaryen in the Seven Kingdoms.

The Mad King Aerys II lost the fortress during Robert's Rebellion. After the Mad King's defeat, Robert Baratheon gave the castle to his brother Stannis, and, as you may recall: it's the same, grim place in which we saw Stannis, Melisandre, Davos, Selyse and Shireen in the previous seasons of the show. It's also the same castle in which Melisandre seduces and leeches Gendry's royal blood in season 3.

Dragonstone's history is fascinating. It was built by the Valyrians two centuries before the Doom, even before the arrival of Aegon the Conqueror to Westeros, and became the westernmost Valyrian Freehold; it's an old castle with massive towers, shaped by the Valyrians with the use of fire and arcane arts. Without a doubt, Dragonstone is a great place for Dany to start her conquest of the Seven Kingdoms.

Dany will return to her birthplace

The amazing throne we saw in the trailer comes with a chair covered in metal scales, scales that resemble dragon's scales (as we clearly saw in a set photo a few weeks ago). We must also remember that Dragonstone is the place in which Daenerys was born. She's actually known as Daenerys Stormborn because she was born on Dragonstone during a powerful storm.

The castle is also depicted in the trailer when Dany stands in front of a high gate. As we can see from the emotion on Dany's face when she touches the sand on the shores of the island, the return to her birthplace will be thrilling for her!

Recently HBO has disclosed the running time of the first episode of season seven: this year’s premiere, at 58 minutes, will be the longest since season four.

Don't forget: the next season of "Game of Thrones" will premiere on July 16.