The Moravian Karst (map) is a karst landscape and protected nature reserve to the north of Brno, located near the town of Blansko (map).
The Moravian Karst is one of the most important karst areas in Central Europe. It is comprised of heavily karstified Devonian limestones. Karst formations have developed here both on the surface and underground on an area of 100 km2. There are more than 1,000 known caves in this area, five of which are open to the public.
This region is also home to one of the most important single geological features in the Czech Republic, the Macocha Abyss (map), a gorge 138 m deep, which was formed when the ceiling of a cave chamber collapsed.
+ More information > Wikipedia • Wikivoyage

The Moravian Karst is literally interwoven with a dense network of tourist trails. A green tourist trail, beginning at the railway station, leads from Blansko to Skalní Mlýn (the “heart” of the karst, map) where there is an information centre and car park. A yellow trail will bring you here from Sloup and the Sloup-Šošůvka Caves (map). Another important point is the upper viewing point of the Macocha Abyss, where the yellow trail from Sloup meets up with a red trail from Rudice.
It is essential to book tickets to the Punkva Caves in advance, especially in the summer tourist season. We recommend booking at least a week in advance! The caves can only accommodate a limited number of visitors in view of the maximum number of people that can be carried by the boat.
Tickets to the Balcarka, Katherine, Výpustek and Sloup-Šošůvka Caves are usually available, and no reservation is necessary.
Finally one important piece of advice – don’t forget to dress warmly, as the temperature in the caves is 7–8 °C!!!
+ INFO >> Pavilon Anthropos • Jeskyně Balcarka • Býčí skála • Císařská jeskyně • Kateřinská jeskyně • Králova jeskynĕ • Propast Macocha • Punkevní jeskyně • Sloupsko-Šošùvské jeskyně • Ochozská jeskynĕ • Jeskyně Výpustek (showcaves.com)

IDOS | Seznam – Both sites cover all Czech trains, buses and city transport and many train and bus lines abroad.
IDS JMK – Integrated transport system of the region.
DPMB.cz – Public transport of the city.
+ Public transport in Brno (gotobrno.cz)
BUS > Good service is offered by Eurolines and RegioJet. Cheap tickets from Poland are offered by FlixBus.
RAIL > Brno is an important stop on the Prague–Vienna and Prague–Bratislava–Budapest railway line; all IC, EC and Railjet trains stop here. For some trains originating in Prague, it is a terminal stop.
The railway system of the Czech Republic is relatively fast, reliable and very dense. Most trains are operated by the state company Czech Railways (České Dráhy – ČD) + LEO Express • RegioJet. *Rail travel in Czech Republic
AIRPORTS > Václav Havel Airport – about 10 km west of the centre of Prague.
WATERWAYS > Korn Ferry • River Boats Prague
Mapy.cz – is a good source for cycling information – switch the map (via Změnit mapu – Turistická) to see cycling routes in violet color.