Understanding the Underground Climate

The temperature inside the Brno underground medieval cellars is very consistent. It usually stays between 50 and 54 degrees Fahrenheit regardless of the season. This stability occurs because the thick stone walls provide excellent insulation. In the summer, these tunnels feel like a natural air conditioner. In the winter, they may feel surprisingly mild compared to the freezing air outside. High humidity is also common in these deep spaces. You might see moisture glistening on the ancient brickwork. This environment was perfect for brewing beer and storing perishables in the Middle Ages. Modern visitors should prepare for this damp and cool setting.

10 Best Sites in the Brno Underground

Exploring the subterranean city requires a good plan. There are many distinct locations to visit. Here are the top picks for your underground adventure in Brno.

• Quick Pick: Best Overall: Labyrinth under the Vegetable Market.
• Quick Pick: Best for History: Mintmaster’s Cellar.
• Quick Pick: Best for Families: Spilberk Casemates.
• Quick Pick: Best Unique Experience: 10-Z Nuclear Shelter.

1. Name: Labyrinth under the Vegetable Market Type: sight Why go: This is the most famous part of the city's hidden world. It features a complex web of tunnels used for food storage and alchemy. Best for: History buffs. Where: Zelný trh (Vegetable Market). Time: 60 minutes. Cost: Moderate. Getting there: Walk from the main train station. Tip: Book Labyrinth under Vegetable Market Brno tickets in advance.
2. Name: Ossuary at the Church of St. James Type: experience Why go: It is the second-largest ossuary in Europe. The site holds the remains of over 50,000 people in a respectful display. Best for: Dark history fans. Where: Rašínova street. Time: 30-45 minutes. Cost: Low. Getting there: Near the main square (Náměstí Svobody). Tip: The lighting is very atmospheric for photography.
3. Name: Mintmaster’s Cellar Type: museum Why go: Learn about the history of coin minting in Moravia. The cellar showcases medieval craftsmanship and royal history. Best for: Families. Where: Dominikánské náměstí. Time: 45 minutes. Cost: Low. Getting there: Short walk from the New Town Hall. Tip: Look for the interactive displays on coin making.
4. Name: 10-Z Nuclear Shelter Type: unique experience Why go: A Cold War bunker built to protect the city's elite. It features original machinery and a retro milk bar. Best for: 20th-century history fans. Where: Husova street. Time: 1.5 hours. Cost: Moderate. Getting there: Located at the base of Spilberk Hill. Tip: You can actually stay overnight in some parts of the bunker.
5. Name: Spilberk Castle Casemates Type: sight Why go: These were once the most feared prison cells in the Austro-Hungarian Empire. The vaulted ceilings are impressive and eerie. Best for: Adventure seekers. Where: Spilberk Castle. Time: 1 hour. Cost: Moderate. Getting there: Hike up the hill from the city center. Tip: Check out the Spilberk Castle visiting guide for more details.
6. Name: Capuchin Crypt Type: experience Why go: See the naturally mummified bodies of Capuchin monks. The unique airflow in the cellar preserved them for centuries. Best for: Those interested in religious history. Where: Kapucínské náměstí. Time: 30 minutes. Cost: Low. Getting there: Very close to the Vegetable Market. Tip: Be respectful as this is a religious burial site.
7. Name: Petrov Hill Crypt Type: sight Why go: Located beneath the Cathedral of St. Peter and Paul. It contains foundations of the original Romanesque church. Best for: Architecture lovers. Where: Petrov Hill. Time: 30 minutes. Cost: Very low. Getting there: Walk up the stairs from the Denis Gardens. Tip: Combine this with a climb up the cathedral towers.
8. Name: Old Town Hall Cellars Type: sight Why go: These small cellars often host art exhibitions. They provide a quiet look at medieval masonry. Best for: Art lovers. Where: Radnická street. Time: 20 minutes. Cost: Free or low. Getting there: Locate the famous "crooked" turret on the Town Hall. Tip: Look for the Brno Dragon hanging nearby.
9. Name: Punkva Caves Type: day trip Why go: Located just north of Brno in the Moravian Karst. It features a boat ride on an underground river. Best for: Nature enthusiasts. Where: Blansko area. Time: 3-4 hours (including travel). Cost: High. Getting there: Take a train to Blansko and then a local bus. Tip: Reservations are mandatory months in advance for summer visits.
10. Name: Kateřinská Cave Type: day trip Why go: Famous for its massive main chamber with incredible acoustics. It is part of the same karst system near the city. Best for: Music and nature lovers. Where: Moravian Karst. Time: 2 hours. Cost: Moderate. Getting there: Best reached by car or tour bus from Brno. Tip: Wear sturdy shoes as the floor can be slippery.

Planning Your Visit to the Labyrinth

Visiting the underground requires some preparation. Since the temperature inside the Brno underground medieval cellars is low, bring a sweater. Even on a hot July day, you will feel the chill quickly. Most tours last about an hour. Comfortable walking shoes are essential because the floors are often uneven stone. You should also check what to see in the Brno underground labyrinth before you go. This helps you choose the right tour for your interests. Some areas have low ceilings, so watch your head. Most sites are not wheelchair accessible due to steep stairs. Always check the official website for updated opening hours in 2026.