A

• Ancient underground cities(1 C, 4 P)

P

• Path (Toronto)(39 P)

U

• Underground cities in Taipei(6 P)

• Underground city

*

• Underground living

A

• Underground Atlanta
• Avinguda de la Llum

B

• Bupyeong Station

C

• Cappadocia
• Central Government War Headquarters
• Chicago Pedway
• Chūō-ku, Fukuoka
• Coober Pedy
• Crystal City, Virginia

D

• Dallas Pedestrian Network
• Downtown Halifax Link

E

• Eskigümüş Monastery

F

• Faizrakhmanist
• Forestiere Underground Gardens

G

• The Gopher Way

H

• Houston tunnel system

K

• Kamiyachō Shareo

L

• London Under

M

• Menzoberranzan
• Mole people
• Mole people (fiction)
• Underground City, Montreal

N

• Nushabad

O

• Oklahoma City Underground

P

• Path (Toronto)

S

• Seattle Underground
• Sentralanlegget
• Shanghai tunnels
• Shiodome City Center
• Skenderija
• Subterranean Toledo

U

• Underground City (Beijing)

V

• The Village Subway

W

• Winnipeg Walkway
• Winter Street Concourse