Darkness rises from the depths of the Macocha Abyss, a gaping chasm that plunges 138 metres into the limestone heart of the Moravian Karst. This is the deepest abyss of its kind in Central Europe, a vertical shaft formed by the collapse of an underground cave ceiling. From the upper viewing platform, the bottom seems impossibly far below, a dark green pool reflecting the narrow circle of sky above. The Punkva River, which carved this entire cave system over millions of years, flows invisibly beneath the abyss floor. A guided tour leads through the connected cave system, past stalactites and underground lakes.
In This Article
Geology and Formation of the Abyss
The Macocha Abyss, known in Czech as Propast Macocha, is a sinkhole in the Moravian Karst cave system of the Czech Republic, located north of the city of Brno near the town of Blansko. The abyss was formed when the ceiling of a large underground cave collapsed, creating a vertical chasm 138.7 metres deep, the largest gorge of its kind in the Czech Republic and in Central Europe. The upper part of the chasm measures approximately 174 metres in length and 76 metres in width. The name Macocha, meaning stepmother in Czech, originates from a 17th-century legend about a cruel stepmother who threw her stepchild into the abyss, only to later fall in herself while fleeing from justice. The Punkva River, which flows through the cave system and emerges briefly into daylight at the bottom of the abyss, carved the entire complex over millions of years through the dissolution of limestone bedrock. The abyss bottom is covered with debris from the collapsed ceiling, and the river fills two small lakes known as Horní (upper) and Dolní (Lower). The upper Lake is approximately 13 metres deep and visible from the upper viewing platform, while the Lower Lake, hidden between rocks, reaches a depth of about 30 metres.
The Punkva Cave System Tour
The Macocha Abyss forms part of the Punkva Cave system, one of the most popular show caves in the Czech Republic. A guided tour lasting approximately 60 minutes descends through illuminated passages past stalactites, stalagmites, and underground lakes, including a memorable boat ride along the Punkva River through the deepest sections of the cave. The cave temperature remains at a constant 8 degrees Celsius year-round, so a warm jacket is essential even during summer. The tour route passes through several large chambers decorated with intricate flowstone formations, including the famous Sněhurka (Snow White) stalagmite and the massive Zrcadlové jezero (Mirror Lake), whose still surface reflects the cave ceiling with perfect clarity. The upper viewing platform over the abyss, known as the upper Bridge, was constructed in 1882 and provides a dizzying view straight down into the chasm. The Lower Bridge, built in 1899, is positioned approximately 92 metres above the abyss bottom and offers a closer perspective. Both platforms are accessible separately without the cave tour, making the site visitable even for those who prefer not to enter the underground passages.
Visiting the Moravian Karst
The Moravian Karst is the largest and most heavily karstified region in the Czech Republic, encompassing more than 1,100 documented caves across an area of approximately 100 square kilometres. Beyond the Punkva Caves and Macocha Abyss, several other show caves are open to the public in the region. The Kateřinská Cave features enormous limestone columns and a large chamber used for concerts, while the Balcarka Cave displays intricate cave coral formations. The Sloupsko-šošůvské Caves, the longest cave system in the Moravian Karst, offer a two-hour tour through vast underground spaces. The Skalní Mlýn visitor centre serves as the main information hub for the area, housing geological exhibits in English, German, and Czech, and providing ticket sales and tour booking services. The town of Blansko, 5 kilometres from the caves, offers accommodation options ranging from budget hostels to comfortable hotels, with restaurants serving traditional Czech cuisine including svíčková and trdelník. The nearest major city, Brno, is approximately 20 kilometres away and is reachable by bus or car within 30 minutes.
View Macocha abyss in Czech republic – the deepest abyss in Central Europe in a larger map
Would you descend into the deepest abyss in Central Europe? 🕳️
Explore more Czech Republic travel guides.
Explore More
If you enjoyed this article, you might also like: