This mountain city in Bulgaria is known as the Machu Picchu of Europe but is less crowded and easier to get to, while still full of ancient mysteries.

The medieval settlement included an inner city-citadel on a high rocky plateau, an outer city and unfortified suburbs.

Bulgaria Air, the national airline ... Among the main natural attractions are Rila National Park, home to the monastery of the same name and Musala Peak, the highest in the Balkans; Pirin National ...

The Foreign Office has issued a key update as terrorist attacks "cannot be ruled out" in a popular European holiday spot.