The Bird's Nest in Dark Souls 3 is a very interesting place in the game. You can throw things to exchange for things. However, because the location is relatively remote, many players can't find it. In fact, we need to climb the high tower next to the Fire Transferring Sacrifice and turn on the bridge in the middle. You can reach the roof.
1. First, we come to the fire-passing sacrificial site.
2. Then buy a tower key from the merchant nearby.
3. After coming out of the merchant, turn right and go up the stairs, and go up the stairs on the right.
4. After going upstairs, go to the location shown in the picture, turn left and back, and continue going upstairs.
5. Go all the way to the location shown in the picture and exit through the opening on the right.
6. There is a locked tower here. You can open the door with the key you just bought.
7. When you reach the top of the tower, you can see a bridge. Go to the gap in the middle and turn left.
8. Then go down little by little along the edge of the gap, being careful not to fall directly here.
9. After coming down, go all the way to the edge of the roof and you will find the bird's nest.
10. There is a staircase on the left side of the roof here. After you kick it down, you can go directly here next time.