Photo taken on Nov. 18, 2020 shows the early morning view of the windmills in Kinderdijk, the Netherlands. The windmills of Kinderdijk, a UNESCO World Heritage site since 1997, are one of the most famous Dutch tourist attractions. Due to the COVID-19 pandemic there are hardly any tourists on site. (Photos: Xinhua)

Photo taken on Nov. 18, 2020 shows the early morning view of the windmills in Kinderdijk, the Netherlands. The windmills of Kinderdijk, a UNESCO World Heritage site since 1997, are one of the most famous Dutch tourist attractions. Due to the COVID-19 pandemic there are hardly any tourists on site.

A runner runs along the windmills in Kinderdijk, the Netherlands, Nov. 18, 2020. The windmills of Kinderdijk, a UNESCO World Heritage site since 1997, are one of the most famous Dutch tourist attractions. Due to the COVID-19 pandemic there are hardly any tourists on site.

Photo taken on Nov. 18, 2020 shows the early morning view of the windmills in Kinderdijk, the Netherlands. The windmills of Kinderdijk, a UNESCO World Heritage site since 1997, are one of the most famous Dutch tourist attractions. Due to the COVID-19 pandemic there are hardly any tourists on site.