Since 2013, ice sculptors have flocked to the Slovak Tatra mountain hamlet of Hrebienok every winter to build a Tatra Ice Temple, or scaled-down replica of a famous church using only crystal-clear ice blocks. This year, it's an 11-metre (36-foot) tall version of the 16th-century Vatican basilica, complete with the imposing two half-circle wings of Bernini's colonnade.