https://joy.videvo.net/videvo_files/video/free/2019-02/large_watermarked/181015_Extra_Bulgaria_016_preview.mp4 Bulgarian Academy of Science at Sunset Timelapse of the Academy of sciences in Sofia, Bulgaria, at sunset. academy of scienceacademy of sciencesbalkansbulgariabulgarianeveningresearch institutesofiasundownsunsettime lapsetimelapsetwilight