The Via Dinarica Mega Trail crosses eight countries and offers activities for all kinds of adventurers: hiking, ski touring, kayaking, white water sports and winter sports. It is also home to amazing views and centuries of cultural heritage.
Police have not disclosed any motive for the attack and are investigating.
The mayor of Vlora in Albania sees his region as the "future queen of the Mediterranean" and he's happy for infrastructural development to increase tourism. But plans to build an airport in an environmentally protected area are leaving bird experts horrified.
The clashes are becoming a flashpoint between the Socialist government and the centre-right opposition party who have demanded the prime minister's resignation.
Protesters threw stones and flares at police, according to Albania's interior ministry.