Four geographical layers cover a big area, but are available at a low resolution:

U.S., UTM 13N
  South America, UTM 20S
Europe, UTM 33N
  Greater Middle East, UTM 39N

 

High resolution layers

America
U.S., Aaleutian Islands, UTM 1N
  U.S., Alaska, UTM 6N
  Canada, West coast, UTM 9N
Canada, Quebec, UTM 19N
  U.S., West coast, UTM 11N
  U.S., central, UTM 14N
U.S., East coast, UTM 17N
    Mexico, UTM 14N
   

Central America, UTM 16N

Caribbean, UTM 18N
  South America, North, UTM 20S
  South America, East, UTM 20S
South America, central, UTM 20S
    South America, South, UTM 20S
   
Europe
Iceland, UTM 27N
    Atlantic islands, UTM 28N
    Portugal, UTM 29N
Iberia, UTM 30N
  UK, UTM 30N
  France, UTM 31N
Italy, UTM 32N
  Fennoscandia, UTM 33N
  Mitteleuropa, UTM 33N
Aegean, UTM 34N
  Eastern Europe, UTM 35N
  Turkey, UTM 36N
Africa
Maghreb, UTM 31N
    Egypt, UTM 36N
    Western Africa, UTM 30N
Central Africa, UTM 33S
    Eastern Africa, UTM 36N
    South Africa, UTM 34S
Asia
Middle East, UTM 37N
  Caucasus, UTM 38N
  Arabian peninsula, UTM 38N
Central Asia, UTM 43N
 

India, UTM 44N

  Eastern India, UTM 45N
South-East Asia, UTM 47N
 

China, Sichuan, UTM 48N

  Mongolia, UTM 48N

Indonesia, UTM 49N

 

  Eastern China, UTM 50N
 

Philippines, UTM 51N

Japan and Korea, UTM 53N
  Western Pacific, UTM 54N
  Kamchakta, UTM 57N
Oceania
Western Australia, UTM 51S
  South-East Australia, UTM 55S
  Coral Sea, UTM 56S
New Zealand, UTM 59S
  Hawaii, UTM 4N