Ostrava - Lower Vítkovice (Dolní Vítkovice)
Vítkovice ironworks were established in 1828 and the last blast furnace stopped production in 1998. After that, the area was re-built and in 2012, it was made accessible to the public as a national site of industrial heritage.
I am pretty impressed that you have covered the Czech Republic as far as Ostrava. What a great image.
In fact, although I am now living abroad I consider Ostrava my home city because I grew up there :)
And I still visit Northern Moravia twice a year.