… but the trees are already covered with ice.
Yes, you recognized it correctly. This is Bulevardul Cetăţii in Târgu Mureș, Romania.
And the following photos I took close to the nearby village of Maiad/Nyomat, where the sun had already defrosted the trees, but the grass was still frozen.
The Happy Hermit 
Nice photos! Those frosty trees gives the place such a mystical view.
Thank you!
Meanwhile everything is covered with snow, so I will have to add new photos soon.