Areas with echoes

• Andalusia

  72 echoes

• Aragon

  16 echoes

• Asturias

  5 echoes

• Autonomous Region of Madrid

  35 echoes

• Balearic Islands

  8 echoes

• Basque Country

  13 echoes

• Canary Islands

  27 echoes

• Cantabria

  4 echoes

• Castille and León

  40 echoes

• Castille-La Mancha

  15 echoes

• Catalonia

  427 echoes

• Estremadura

  12 echoes

• Galicia

  42 echoes

• La Rioja

  1 echo

• Murcia

  13 echoes

• Navarre

  8 echoes

• Principality of Asturias

  1 echo

• Region of Murcia

  5 echoes

• Valencia

  23 echoes

• Valencian Community

  28 echoes

There are 2 echoes in the Twilight Zone.
They are located in Spain but the exact area is unknown.