Just before Deanarys goes completely Apocalypse Now on King's Landing in Game of Thrones S08E06, there is a moment of eerie quiet. After this brief moment of realizing the abysmal situation they're in, the most vociferous of the people start using the uncanny urban acoustics to their advantage: "Ring the bells!", "Ring the bells!!", "Ring the bloody bells!".
In a city housing a million people, this cry is echoed from all quarters, and it is implied even the queen herself hears it. I guess reverberation and amplification work differently in Westeros, but that is not what my question is about.
That tower, specifically. It can be seen during the first overview of King's Landing. It first caught my attention because it looks like an anachronistic foam concrete tower, but, more pressingly, there seems to be no way to get to the bell: as the camera flies by, we can see there is no trap door in the floor, or exterior rope against the wall on at least two sides of the building. Ironically, this is shown in S08e05, titled 'The Bells'.