The Park Colonnade, also known as Sadová kolonáda, is a charming cast-iron structure in Karlovy Vary that used to be a concert and restaurant hall. Built in 1881 by architects Ferdinand Fellner and Hermann Helmer, it now houses the Snake Spring and offers access to the Park Spring. Visitors can enjoy the historic ambiance while sipping on the mineral-rich waters or taking a leisurely stroll through Dvořák's Park. It's a cool spot to chill and soak up some spa vibes in this picturesque Czech town.