Useful sites in Greek for the completion of the first task
http://www.naturagraeca.com/ws/119,181,1,1,%CE%95%CE%B8%CE%BD%CE%B9%CE%BA%CE%AC-%CF%80%CE%AC%CF%81%CE%BA%CE%B1
https://el.wikipedia.org/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%95%CE%B8%CE%BD%CE%B9%CE%BA%CE%AC_%CF%80%CE%AC%CF%81%CE%BA%CE%B1_%CF%84%CE%B7%CF%82_%CE%95%CE%BB%CE%BB%CE%AC%CE%B4%CE%B1%CF%82
http://www.geogreece.gr/parka.php
https://el.wikipedia.org/wiki/%CE%95%CE%B8%CE%BD%CE%B9%CE%BA%CE%BF%CE%AF_%CE%B4%CF%81%CF%85%CE%BC%CE%BF%CE%AF_%CF%84%CE%B7%CF%82_%CE%95%CE%BB%CE%BB%CE%AC%CE%B4%CE%B1%CF%82
http://www.junex.gr/index.php/el/ethniko-parko-prespon
http://www.ypeka.gr/Default.aspx?tabid=433
https://www.katafigiovaliacalda.com/grnatpark.htm
www.parnitha-np.gr/ethnika_parka.htm
https://el.wikipedia.org/wiki/%CE%9A%CE%B1%CF%84%CE%B7%CE%B3%CE%BF%CF%81%CE%AF%CE%B1:%CE%95%CE%B8%CE%BD%CE%B9%CE%BA%CE%AC_%CF%80%CE%AC%CF%81%CE%BA%CE%B1_%CF%84%CE%B7%CF%82_%CE%95%CE%BB%CE%BB%CE%AC%CE%B4%CE%B1%CF%82
http://www.geogreece.gr/parka.php
https://el.wikipedia.org/wiki/%CE%95%CE%B8%CE%BD%CE%B9%CE%BA%CE%BF%CE%AF_%CE%B4%CF%81%CF%85%CE%BC%CE%BF%CE%AF_%CF%84%CE%B7%CF%82_%CE%95%CE%BB%CE%BB%CE%AC%CE%B4%CE%B1%CF%82
http://www.junex.gr/index.php/el/ethniko-parko-prespon
http://www.ypeka.gr/Default.aspx?tabid=433
https://www.katafigiovaliacalda.com/grnatpark.htm
www.parnitha-np.gr/ethnika_parka.htm