He has published a picture story of how the city looks today on his blog.
In Luhansk, Krotov saw completely deserted streets and a post-war ruin which militants failed to cope with during the past year.
"The city looks simpler and poorer than Donetsk. Here, you won't see placards and portraits of the "LPR" leader, or souvenir magnets bearing his photos. Public transportation costs 10 rubles (approx. $0.12). The life here is more expensive than in Donetsk, particularly transport, which is rarer, both local and interregional," the traveler notes.
His pictures show barren streets with no transport or people on them, broken windows of homes, waiting for restoration for more than a year, shell-stricken empty shopping malls.
Sovetskaya Street - the central artery of Luhansk, which could easily experience traffic jams before the war, is now almost free of vehicles.
"A few trolleybuses are said to operate, though I failed to have a ride - they arrive very seldom and I saw one only two times. Trams no longer operate in Luhansk, only rails are left," Krotov wrote.
In commentaries, people say that Luhansk started to remind North Korea after the war broke out.
"Hmm, photos inspire optimism! Overall, we have a good illustration of human stupidity, IMHO."
"North Korea, true and deserted."
"Dreams come true. Restoration of Soviet era, ruin, and empty streets," the comments read.
The only group of people in Krotov's photos is a column of militants wearing Russian military uniform and carrying a banner of the so-called "LPR."
Related materials: Occupied territories - Crimea and Donbas