Mağaralar
- tourism.restexpert.com Pyatigorsk Proval LakeThe lake was called Proval (breakdown) by Academician Johann Güldenstädt, who first described it in 1773.
- tripadvisor.com Attraction_Review-g298534-…According to the local scientists the Proval is an extinct crater which is located on the southern slope of Mashuk, on the outskirts of Pyatigorsk.
- izi.travel en/7608-lake-proval/enProval is a mysterious underground lake, which can be seen after a walk through a long tunnel.
- geomerid.com en/place/proval-lake-pyatigorsk-…Proval Lake became a real sight in 1858 when a horizontal tunnel had been driven leading to a big apron in front of it.
- 3pulse.com en/sights/provalThings to do near Proval Best places in Pyatigorsk.
- shutterstock.com search/proval-lakePyatigorsk, Russia - September 30, 2020: Proval Lake entrance at Mountain Mashuk in Pyatigorsk, a spa city in Caucasian Mineral Waters region...
- 360cities.net image/proval-lake-pyatigorsk"Proval" is a natural cave on the mountainside Mashuk, natural monument, is a conical funnel 15 inches in diameter and a height of 41 meters, and at the bottom...
- commons.wikimedia.org wiki/Category:ProvalMosaic icon near the lake Proval Мозаичная икона у озера Провал.jpg 5,472 × 3,648; 17.48 MB.
- dreamstime.com lake-proval-city-pyatigorsk-…beautiful natural underground karst mineral lake Proval with pure blue water of Mashuk mountain in Pyatigorsk, Northern stock images.
- tr.advisor.travel poi/Proval-lake-19796Proval lake (Русский: Озеро Провал) bir turistik, içinde Göller biridir Pyatigorsk , Rusya .