Kyiv Pechersk Lavra stands as one of the oldest and most significant monasteries in Ukraine and the former Soviet Union. Only a handful of monasteries have ever received the title of Lavra, marking special religious importance, and this Cave Monastery is the earliest of them all. Its foundation dates back to 1077, when St. Antoniy established it. In its earliest days, priests lived as hermits in caves they dug themselves, seeking solitude and spiritual devotion beneath the earth.
Today, these ancient caves draw both the faithful and curious visitors. Many come to see the mummified remains of monks, which are displayed in dimly lit underground passages. Pilgrims are still welcomed to the underground church, reflecting a tradition that has lasted for centuries. Candlelight flickers along the walls, kept alive by those seeking a quiet moment or a sense of connection to the past.
The complex is divided into two parts. The Upper Lavra belongs to the state and is home to several museums. There is an entry fee for this area, but it promises a range of exhibits, including a unique display of micro-miniatures. These tiny works of art, though easy to overlook, often surprise visitors with their detail and craftsmanship.
The Lower Lavra, on the other hand, is owned by the Orthodox Church . This is where the famous caves are found. Visitors must buy a candle to enter, using its flame to guide them through the dark corridors. Modest clothing is required for entry; women, in particular, must cover their hair and wear skirts, though pants are sometimes allowed in winter. Scarves can be bought at the entrance.
It is recommended to visit the caves early in the day, before crowds gather. There are two main cave complexes in the monastery, each holding the preserved bodies of monks, religious icons, and other relics. Both cave systems are accessed through churches, with one entrance found at the end of a wooden boardwalk. While there is no fee to enter the caves themselves, the small candle is required for anyone who wishes to explore the passageways.
The caves are narrow and winding, which can be challenging for those who are uncomfortable with small spaces or who are very tall. Once inside, there is little room to turn around—visitors must keep moving forward, following the tradition of countless pilgrims before them.
Source - https://en.wikipedia.org/wiki/Kyiv_Pechersk_Lavra