empty charles bridge in the center of prague during first wave of covid-19 pandemy in the night with blue sky and yello

architecture background baroque beautiful black blue bohemia bridge building castle cathedral center charles city cityscape coronavirus covid19 czech czechia darkness destination dusk empty europe european famous first gothic greyscale history illuminated illumination lights medieval monument night nobody old pandemy popular prague praha river scenic sky statue stone sundown sunset tourist tower town travel twilight unesco view vltava wave white yello yellow