Municipality of Tryavna
http://www.tryavna.bg/

Regional tourist association
Stara Planina

http://www.staraplanina.org/bg/triavna.php

Tryavna - travelling.POP.BG
http://travel.pop.bg/

Mountain Tourism
http://staraplanina.start.bg/

100 national tourist sites
http://www.tourism-bg.net



     

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