Chełm Chalk Tunnels

The Chełm Chalk Tunnels (say HWEM, with a soft h) are a maze of passages cut into chalk beneath the Old Town of Chełm in eastern Poland, billed as unique in Europe. Locals mined chalk here for centuries, and part of the old workings is now a guided tourist route where it stays around 9 °C (48 °F) all year. If you are looking for things to do in eastern Poland on a rainy or very hot day, it is an atmospheric underground stop.

How the labyrinth formed

Chalk mining began in the 13th century, after Prince Daniel rebuilt Chełm. Townspeople dug it from their own cellars and sold it for construction, ceramics and dyeing, and some even reached Kraków. Mining peaked in the 17th and 18th centuries. The separate workings gradually joined into a system estimated at about 40 km (25 miles), spread over 4-5 levels and reaching more than 20 m (65 ft) underground.

In the 20th century, ceilings collapsing under the Old Town became a danger, with the largest incident on 29 November 1965. Between 1966 and 1973 part of the passages were filled with sand or walled off, while others were secured and prepared for visitors. The present route opened in 1972 and reached its final layout in 1985. The tunnels were entered in the register of monuments on 25 January 1995.

What you will see

The route is almost 2 km (about 1.2 miles) long and runs under the central part of the Old Town. The visit takes about 50 minutes, and you can go only with a guide. Expect:

• narrow corridors and chambers with pale chalk walls,
• displays on archaeology, chalk mining and the history of Chełm,
• ceiling supports and examples of how medieval miners worked,
• bats and the local legend of Bieluch, a ghostly guardian of the tunnels.

Tours are in Polish; I could not confirm English-language tours, so ask the staff before you buy tickets. The route ends through an 18th-century brick lining.

Fun facts and the story of visiting

In the 17th century 80 of 100 houses in the center had an entrance to the underground, and documents called them "walled necks". The first tours of the workings were organized by the Chełm branch of the PTTK tourist society in the early 20th century (two trips took place in 1911), and a short route of about 300 m was created in 1937-1939. During the securing work after 1965, a crew of miners from Mysłowice made the passages safe, and Professor Wiktor Zin stressed that about 8 km of workings had been surveyed, roughly one fifth of the whole system. In other words, most of the labyrinth remains closed to the public.

Planning your visit

Allow about an hour for the route including the walk to the entrance. Tours leave at fixed times, so from September to June there are only four departures a day: buy tickets ahead, especially on weekends and in summer. It combines easily with a stroll through the Old Town and a climb up Chełm Hill. In autumn and winter the tunnels are a shelter from the cold, though 9 °C is not warm, so bring a sweater.

Who it suits and what to bring

The official website advises people with claustrophobia not to take the route, and the corridors are narrow. Bring a warm layer, since the temperature is constant and humidity is 70-85%. Children under 5 enter free. The operator does not publish information on strollers or wheelchairs, so ask about access first.

Practical information (as of October 2026)

• Entrance: ul. Lubelska 55A, Chełm.
• Tour times (guided only): September to June at 10:00, 12:00, 2:00 and 4:00 p.m. In July and August every hour from 10:00 a.m. to 5:00 p.m. (last entry). Office: 9:00 a.m.-5:00 p.m. outside summer.
• Closed: 1 and 6 January, Easter, Corpus Christi, 15 August, 1 and 11 November, 24-26 December.
• Tickets: the official site gives a range of PLN 13 to 35 plus a 5% online service fee. According to the Chełm tourist information centre, a regular ticket is PLN 35 and a reduced one PLN 29, with 30% off for holders of local discount cards.
• Booking: buy online via abilet.pl. Collect a reservation 10 minutes before the tour, arriving 15 minutes early, or it is cancelled.

Getting there

Chełm is about 65 km east of Lublin as the crow flies, so Lublin is the natural base. Parking is available near the entrance, but the strict center of the Old Town is closed to cars. Coaches use the lot by the City Park on ul. Armii Krajowej.

Nearby

Walk the Old Town and climb Chełm Hill (Góra Chełmska) after your tour. The wider Lublin region has more castles, palaces and sanctuaries.