Topic
White Pass & Yukon Route (Firm)
86
Mountains--Alaska
28
Railroad tracks--Alaska
27
Mountain passes--Alaska
24
Gold rushes
22
White Pass (B.C.)
21
Alaska
19
Canyons--Alaska
18
Trails & paths--Alaska
18
White Pass Trail
17
etc
17
structures
17
Alaska)
15
Northwest
15
Railroad tracks--Alaska--White Pass
14
Pacific -- History -- 20th century
13
White Pass Trail (Alaska)
13
Railroads
11
Rivers--Alaska
11
Trails--Alaska
11
Skagway
10
White Pass
10
Alaska Gold Rush
8
Animalia
8
Arthropoda
8
Biodiversity
8
Group portraits
8
Insecta
8
Lakes & ponds--British Columbia
8
Skagway River (Alaska)
8
Taxonomy
8
Railroad locomotives--Alaska
7
Tents--British Columbia
7
Cities & towns--Alaska
6
Diptera
6
Horses--Alaska
6
John Muir
6
Railroad locomotives--Alaska--White Pass
6
Railroad tracks--Alaska--Skagway
6
Skagway (Alaska)
6
Skagway Canyon (Alaska)
6
Sleds & sleighs--Alaska
6
Snow removal--Alaska--White Pass
6
Tunnel Mountain (Alaska)
6
Yukon River (Yukon and Alaska)
6
naturalist
6
travel
6
British Columbia
5
Fairbanks
5
Hartshorn
5
more ...