using the number/letter grid:
1 2 3 4 5 6 7 8 9
A B C D E F G H I
J K L M N O P Q R
S T U V W X Y Z
Where:
A = 1 J = 1 S = 1
B = 2 K = 2 T = 2
C = 3 L = 3 U = 3
D = 4 M = 4 V = 4
E = 5 N = 5 W = 5
F = 6 O = 6 X = 6
G = 7 P = 7 Y = 7
H = 8 Q = 8 Z = 8
I = 9 R = 9
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15 locations

Houston
Texas
Israel
9 15 15
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24 locations

Eastern Bloc countries
Germany
Russia
931191 24
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32 locations

United States
July 4th, 1776 (USA declared independence)
7 + 4 + 1+7+7+6 = 32
UK
32
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33 locations

France
Latin America
Spain
Mexico
456936 33
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36 locations

Colorado
Boulder
any mountainous area
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38 locations

Florida
6369941 38
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60 locations

The Middle East
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63 locations

Seattle
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64 locations

Nordic countries. Polar. Arctic. Antarctica.