Bulgaria earns about 25 million euro from eco tourism, with close to half of eco tours in the country booked by foreigners, according to Lyubomir Popyordanov, head of the Bulgarian Association for Alternative Tourism (BAAT).
BAAT is a non-profit public benefit organisation established in 1998, and has more than 100 members, including national and regional tourist councils, nature parks directorates, specialist tour operators, family hotels, guesthouses and individuals.
The cheapest group package tours start from about 70 to 100 euro a person a day, he said, as quoted by local media.
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(Photos: (c) Clive Leviev-Sawyer)