Jablonec
A very cold and hilly city that is quite close to Liberec. In the language natives use, it is known as "Jebákov" because of folklore reasons. When visiting bring a lot of clothes as even in the summer you still need a lot of clothes since you can usually build igloos in july. There is a lot of glass factories, glass is a thing that makes Jablonec the most money.
I went to Jablonec and they stole my lungs, it was quite unpleasant.