Final answer:
Lake Ohrid lies on the border between Greece, Macedonia (FYROM), and Albania. It is a significant natural and cultural heritage site.
Step-by-step explanation:
The lake that lies on the border between Greece, Macedonia (officially known as the Former Yugoslav Republic of Macedonia or FYROM), and Albania is called Lake Ohrid. This lake is one of Europe’s deepest and oldest lakes, boasting a unique aquatic ecosystem with more than 200 endemic species that are of worldwide importance. The importance of Lake Ohrid extends beyond its biodiversity; it is also a significant cultural heritage site with numerous monasteries, churches, and archaeological sites around its shores.