Which European country is spotted with numerous small concrete bunkers?

Albania
Norway
Serbia
Greece
During the forty-year leadership of Enver Hoxha of the People's Socialist Republic of Albania, over 700,000 bunkers were built in the country – one for every four inhabitants. The bunkers are still seen everywhere in Albania. Most are now derelict, but some have been reused for a variety of purposes including residential dwellings, cafés, storehouses and shelters for animals.
correct this question
Luca Biaggi
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Albania
Norway
Serbia
Greece
answers
flagLithuania
75%
5%
15%
5%
20
flagGreece
73%
0%
26%
0%
15
flagItaly
72%
10%
12%
4%
66
flagGermany
68%
6%
19%
4%
202
flagRussia
64%
12%
24%
0%
25
flagAustria
62%
3%
25%
7%
27
flagSweden
62%
6%
25%
6%
16
flagRepublic of Ireland
60%
4%
26%
8%
23
flagDenmark
60%
4%
34%
0%
23
flagPoland
57%
11%
26%
4%
11335
flagthe Netherlands
57%
14%
28%
0%
49
flagthe United Kingdom
56%
11%
25%
6%
376
flagFrance
55%
14%
25%
3%
27
flagSpain
54%
8%
29%
8%
24
flagUnknown
50%
16%
26%
6%
495
flagCanada
48%
11%
28%
8%
35
flagthe United States
46%
13%
31%
7%
358
flagUkraine
41%
13%
39%
2%
46
flagAustralia
40%
20%
40%
0%
15
flagIndia
34%
25%
31%
6%
32