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Category
Category
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Categories
From Subterranea Britannica
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Subcategories
This category has the following 34 subcategories, out of 34 total.
A
article
C
Caves
Civil Defence
Commercial
Communications
D
Dwellings
E
Electricity and Gas
F
Factories and Storage
Features
Follies and Artistic
G
Government - Local
Government - National and Regional
H
Heating and Hydraulics
I
Ice Wells
Industrial and Scientific
L
locations
M
Military - Land
Military - Air
Military - Intelligence and Communication
Military - Sea
Mines
N
Nuclear Bunkers
Nuclear Monitoring Posts
Nuclear Weapons
P
Places To Visit
Prisons and Detention
R
Radar
Religious and Burial
S
Sewers, Sanitation and Water
Sites
T
Transport
Tunnels
U
Underground Railways and Metros
Unknown Purpose