Underground
#Urban legends
#Notorious crimes
#Momentous events
#Movie mania
#Science uncovered
#Spy stories
#Military and Cold War
#Big names
#Music legacy
#Book links
#Ancient relics
#Hangouts with a twist
#Underground
#Industrial heritage
#Art connections
#Offbeat history
#Architecture and design
#Sports
#Abandoned places
#Toponyms
Caves, Kilns & Chipmunks
Mina de Agua: The Hidden Lifeline of Ronda
Humanity's Doomsday Insurance Policy
Svalbard, Norway
Holly Golightly 
Deep Sleep in a Victorian mine
Tanygrisiau, Blaenau Ffestiniog LL41 3TP, UK
Holly Golightly 
Sauna: 80 meters under
Krongruvvägen 50, Idkerberget, Sweden
Nik Frost 
King's secret tunnel
Pionen civil defence bunker
Elefanten secret nuclear bunker
Atlas Copco's underground testing tunnels
Stockholm Royal Library underground vaults
Carpark in a nuclear bunker
Hidden entrance to a bunker
Abandoned bunker in the woods
Peep into a nuclear bunker
Komandandi tee 2, 10130 Tallinn, Estonia
Tallinn: iconic filming locations and abandoned giants Holly Golightly 
Red Granite for Milan and Paris
Ancient marble quarries (Paros)
Art Gallery in the WWII Bomb Shelter (Milos)
Old sulfur mine (Milos)
Railway station goes underground
Underground weapons production facility
Ågesta underground nuclear power station
Nuclear reactor near Stockholm's heart
Solna Centrum
Solna centrum T-bana, Centralvägen, 171 45 Solna, Sweden
Stockholm's most beautiful underground (Tunnelbana) stations Nik Frost 
Tekniska Högskolan
Tekniska högskolan, 114 28 Stockholm, Sweden
Stockholm's most beautiful underground (Tunnelbana) stations Nik Frost 
Stadion
Valhallavägen 114A, 114 41 Stockholm, Sweden
Stockholm's most beautiful underground (Tunnelbana) stations Nik Frost 
Bagarmossen
Bagarmossen T-bana, 128 43 Bagarmossen, Sweden
Stockholm's most beautiful underground (Tunnelbana) stations Nik Frost 
Rådhuset
Rådhuset, 112 31 Stockholm, Sweden
Stockholm's most beautiful underground (Tunnelbana) stations Nik Frost 
Tensta
Tensta, 163 64 Spånga, Sweden
Stockholm's most beautiful underground (Tunnelbana) stations Nik Frost 
Thorildsplan
Thorildsplan, Thorildsplan, 112 43 Stockholm, Sweden
Stockholm's most beautiful underground (Tunnelbana) stations Nik Frost 
Kungsträdgården
Arsenalgatan 12, Stockholm, Sweden
Stockholm's most beautiful underground (Tunnelbana) stations Nik Frost 
T-Centralen
The Dominican church and under
Roman forum and basilica
Secret defence facility
Hidden underground bathouse
Сахалинский тоннель
Пиванский тоннель (Амурский тоннель).
G368+W4 Центральный округ, Комсомольск-на-Амуре, Хабаровский край, Россия
Россия: Индустриальное наследие
Jermaine 
Старейший магазин музыкальных дисков "Рок-остров"
Рок-магазин Castle Rock
Кирха-кинотеатр-рок клуб-кирха - Четыре жизни Анненкирхе
Кафе Сайгон
Кочегарка Цоя
Эльфовский садик
Детство Цоя - дом со шпилем
Аптека Доктора Пеля
Хармс смотрит на нас из своего дома
Галерея Свиное рыло
Заумное жонглёрство и поэзия классового врага
Мытнинская наб., 5, Санкт-Петербург, Россия, 197198
Петербург Даниила Хармса, гения Абсурда Jermaine 
Война и последние дни
Арсенальная ул., 2, Санкт-Петербург, Россия, 195009
Петербург Даниила Хармса, гения Абсурда Jermaine