Meereen and Fighting Pits of Meereen by Daario Naharis and Messandei – Game of thrones History. I have synched the subtitles.
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In the A Song of Ice and Fire novels, Meereen is the largest city on Slaver's Bay, bigger than Yunkai and Astapor combined.
It is located at least 163 miles north-east of Yunkai.
It is the center and lynchpin of the world's slave trade, and a regular stop on the routes from the Free Cities to the Jade Sea.
When the Dothraki raid Lhazar, they sometimes herd their prisoners downriver to be taken as slaves in Meereen.
Sandstone mountains separate Lhazar from Meereen's hinterland, but the two are linked by the Khazai Pass, through which the Skahazadhan flows.
The city is built with multi-colored bricks and is surrounded by tall, solid walls with towers at every corner.
The north wall runs along the Skahazadhan, while the west wall runs along the bay.
The city has a large harbor located outside the main walls.
Its sewers open directly into the bay.
The noble families of Meereen live in large stepped pyramids, with the most powerful, the Great Masters, living on the Great Pyramid.
The Great Pyramid rears 800 feet above the rest of the city and is one of the tallest structures in the world (along with the High Tower of Oldtown and the Wall).
The city's priestesses are called Graces, and are based at the Temple of the Graces to the west of the Great Pyramid.
Canonically, Valyria had 'thousands of slaves'. The Kindly Man, who may be lying, tells arya the origin story of the Faceless Men, stating the first kill was a slave of Valyria's mines.
Uff I think Daario and Jon may have perosnal fight, because Daario will be jelous of Daenerys. Jon may kill him.