Wild bluebells, which bloom around mid-April turning the forest blue as they form a carpet, are pictured in the Hallerbos, also known as the "Blue Forest", that had to be closed to groups of tourists this year due to the coronavirus disease (COVID-19) outbreak, near Halle, Belgium April 13, 2020. (Photo/Agencies)
Wild bluebells, which bloom around mid-April turning the forest blue as they form a carpet, are pictured in the Hallerbos, also known as the "Blue Forest", that had to be closed to groups of tourists this year due to the coronavirus disease (COVID-19) outbreak, near Halle, Belgium April 13, 2020. (Photo/Agencies)
Wild bluebells, which bloom around mid-April turning the forest blue as they form a carpet, are pictured in the Hallerbos, also known as the "Blue Forest", that had to be closed to groups of tourists this year due to the coronavirus disease (COVID-19) outbreak, near Halle, Belgium April 13, 2020. (Photo/Agencies)
