In this photograph taken on June 28, 2015, a hiker in Hong Kong takes a picture of the city from a walking trail. The southern Chinese territory is crisscrossed by more than 180 miles of designated hiking trails. (Photo by Alex Ogle/AFP Photo)
A man crosses a mud-covered trail carrying his wife on his back at a flooded Han River park in Seoul, South Korea, August 4, 2020. (Photo by Kim Hong-Ji/Reuters)
This photo taken on February 26, 2019 shows an aerial view of a tea field in Zhangping in China's eastern Fujian province. (Photo by AFP Photo/China Stringer Network)
The sun rises over the Baltic Sea and a pier with a tea house in Timmendorfer Strand, Germany, Sunday, August 7, 2022. (Photo by Michael Probst/AP Photo)
The Black Rock Desert is an arid region of lava beds and playa, or alkali flats, situated in the Black Rock Desert-High Rock Canyon Emigrant Trails National Conservation Area, a silt playa 100 miles north of Reno that encompasses more than 300,000 acres of land and contains more than 120 miles of historic trails. It is in the northern Nevada section of the Great Basin with a lakebed that is a dry remnant of Pleistocene Lake Lahontan.