Hiking in Romania through the massive limestone ridges and dense old-growth spruce forests of the Carpathian Mountains was an unforgettable experience. Check out the views when hiking through the Piatra Craiului mountains up to Cabana Curmătura.
R. Jäschke, L. Marinho, A. Hotho, L. Schmidt-Thieme, and G. Stumme. Knowledge Discovery in Databases: PKDD 2007, 11th European Conference on Principles and Practice of Knowledge Discovery in Databases
, volume 4702 of Lecture Notes in Computer Science, page 506-514. Berlin, Heidelberg, Springer, (2007)