A designation given by the United Nations Educational, Scientific and Cultural Organization (UNESCO) to sites of exceptional cultural or natural significance. These sites are recognized for their universal value and are protected for future generations.

Lakes formed by tectonic activity, which involves the movement of the Earth's crust. These lakes are often deep and can be found in rift valleys or depressions created by such geological processes. Lake Ohrid is an example of a tectonic lake.

A geographic region in Southeast Europe, known for its diverse cultures, complex history, and a significant number of independent states. Its strategic location has made it a crossroads of civilizations and a subject of geopolitical interest.