Crossword covers side of building

LVOV, Ukraine, Jan. 9 (UPI) -- Artists in a Ukrainian city have created a 100-foot-high crossword puzzle that covers an entire external wall of a residential tower.

Officials said clues to the giant puzzle, which is aimed at attracting tourists to the city of Lvov, are scattered around parks, theaters, fountains and other landmarks in the city, Britain's The Daily Telegraph reported Friday.

The answers are revealed every day at nightfall, when fluorescent letters placed inside the giant puzzle's squares are illuminated.