Similar to 地下水

North American XB-70 Valkyrie

Blohm & Voss BV 222 Wiking

Boeing C-17 Globemaster III

Fairchild C-123 Provider

Albert Einstein

Walloon Legion

Antonov An-2

Antonov An-70

1

2

3

4

5

6

7

8

9

13 (number)

19 (number)

40 (number)

70 (number)

1,000,000

Seawater

Brackish water

Water stagnation

Spring (hydrology)

Oasis

Subterranean river