Markovi Kuli is a medieval fortress located in the southwestern part of North Macedonia, near the city of Prilep. The fortress was built in the 13th century during the rule of the Serbian Empire and was named after its founder, King Marko. It is situated on a steep hill overlooking the city and the surrounding area.

The fortress was strategically placed at the intersection of several important roads and was used to control the traffic and trade in the region. It is a complex of defensive structures, including walls, towers, and gates. The walls are up to 4 meters thick and up to 10 meters high, with seven towers along the outer perimeter. The fortress covers an area of about 17,000 square meters.

Markovi Kuli was an important center of resistance against the Ottoman Empire during the 14th and 15th centuries. It played a significant role in the battles between the Ottoman and Serbian armies and was used as a shelter by the local population during times of war. The fortress was finally captured by the Ottomans in the late 15th century and was used as a military barracks until the 20th century.

Today, Markovi Kuli is a popular tourist attraction and a cultural monument of national importance. Visitors can climb to the top of the fortress and enjoy panoramic views of the city and the surrounding mountains. The site has been partially restored and is open to the public.