The 30m tall crossword puzzle!

The Ukrainian city of Ivov has recently become home to the worlds biggest crossword! The puzzle covers the entire side of a block of flats.

The questions are located at different locations around the city such
as fountains, theatres etc. Tourists can travel around the city picking
up the clues and finish up here to check how they did because…

…all is revealed when the sun sets.

More info here including a short video.