Vrídlo is the best-known of all of Karlovy Vary’s hot springs. At 72 °C it’s also the hottest, and bursts from the ground at such pressure that it reaches a height of 12 metres, kicking out 2000 litres every minute.
This geyser is contained inside Vrídelní Kolonáda, a functionalist building from the 70s, along with four other springs, all of which can be sampled for free.
For newcomers the water can be pretty strange, so don’t worry about taking more than a sip! Go underground for a tour of the spa’s inner workings and to see how the town’s famous aragonite crystals are formed.