1

on a grass field

2

on tilled ground

3

on packed earth

4

in a recently harvested field

5

in a recently planted field

6

on the side of a hill

7

in an excavated pit

8

in a specially constructed room with wooden floors

9

atop castle walls

10

in a body of water

11

suspended from harnesses

12

on city streets

13

in a magically constructed pocket dimension

14

on a field of bamboo poles

15

in the air

16

on ice

17

on hot coals

18

in the mind

19

on shifting stone slabs

20

wherever there is room