Daznak's Pit

"Many worthy fighters have died trying to make it to the Great Games. When most of you worthless scum join them in death this afternoon, it will represent a significant rise in your station. But if you do happen to triumph here, you will fight at the Great Pit of Daznak itself in front of the queen. So whatever happens, the Gods have smiled upon you today. This is the day your lives actually start to mean something."

- Yezzan zo Qaggaz to his pit fighter slaves

The Great Pit of Daznak or Daznak's Pit is the preeminent fighting pit of Meereen, the northernmost and greatest of the three great city-states of Slaver's Bay.

Season 5
During Daenerys Targaryen's liberation of Slaver's Bay, she defeats Yunkai before marching on Meereen, where she establishes herself as Queen. The fighting pits are abolished along with slavery itself, as the pit fighters are all slaves. However, the Wise Masters of Yunkai return to power and enslave all their freedmen, so Daenerys sends a Great Master at her service, Hizdahr zo Loraq, to negotiate with the Wise Masters, and Daario Naharis and his Second Sons to serve as a threat. When Hizdahr and Daario return they report that their negotiations were successful: the Wise Masters will comply with her abolition of slavery and set up a ruling council of former slaveholders and freedman, as long as Daenerys reopens the fighting pits in Meereen. At first, Daenerys cannot tolerate this concession, despite repeated appeals by Hizdahr and Daario. However, a rise of the attacks by the local insurgent group of the Sons of the Harpy, which results in the death of Ser Barristan Selmy, makes Daenerys reconsider her position and decides to reopen the fighting pits, as well as betrothing herself to Hizdahr zo Loraq.

When Tyrion Lannister and Jorah Mormont are sold into slavery just outside Meereen, their new master Yezzan brings them to the lower fighting pits in order to test them, telling them that those who survive will get to fight at the Great Pit of Daznak in front of the Queen herself.

In the books
In A Song of Ice and Fire,