The quarrying activity at the site dates back to the 15th century and ceased entirely in the early 20th century.
The millstones produced here were primarily used for crushing grapes in the surrounding Tokaj-Hegyalja vineyards.
The basin was created as a result of water filling the deepest part of the quarry after extraction stopped.
Vertical cliffs serve as a natural barrier, creating a microclimate that supports specific moss and lichen species.
The name 'Tengerszem' (Sea Eye) is a Hungarian term used for mountain tarns, reflecting the deep, clear water characteristic of glacial or deep-basin lakes.
The site is managed under the jurisdiction of the Aggtelek National Park Directorate.
The trail leading to the lake includes remnants of ancient workshops and stone carvings still visible in the rock face.
The Tarn of Megyer-hegy is a former 15th-century millstone quarry transformed into a mountain lake located in the Zemplén Mountains. The site is famous for its vertical rock walls, which reach heights of up to 70 meters, surrounding a small, deep pool of water. It was voted the most beautiful natural wonder of Hungary in a 1997 national poll. The surrounding area features a network of hiking trails and is part of the historic Tokaj-Hegyalja wine region. Geologically, the tarn occupies a site once mined for rhyolite tuff, which was used to create high-quality millstones for local wineries. The depth of the basin varies significantly depending on rainfall, creating a reflective surface beneath the jagged cliff edges. Visitors reach the main viewing platforms via a trail system that traverses forested terrain. The site remains a protected nature reserve, emphasizing the intersection of industrial history and forest ecology.
The upper observation platform on the edge of the cliffs provides a panoramic view of the quarry basin and the water below.
Bring sturdy hiking boots as the trails leading to the ridge are steep, rocky, and can be slippery when wet.
Bring a windbreaker or light jacket, as the temperature inside the deep quarry basin is significantly lower than on the plateau.
Visit during the shoulder seasons to avoid the heat and the peak density of weekend crowds.
Attempting to descend directly down the cliff faces into the water; always use the established staircase and path system.
Open year-round, but upper trails may become impassable during heavy winter snowfall or extreme icing.
Stay on marked trails to prevent erosion of the quarry walls; refrain from swimming in the water to protect the ecosystem.
