A couple covered in mud wait for it to dry at the Salt-works lakes near the Black Sea town of Burgas in Bulgaria on July 25, 2019. Thousands of tourists visit the red salt lakes for mud baths, which are believed to help the healing of muscular disorders and rheumatism. (Photo by Nikolay Doychinov/AFP Photo)

At 10,582 square kilometres, the Bolivian salt flats – otherwise known as Salar de Uyuni – are the largest on the planet and contain between 50 and 70% of the world’s lithium reserves. After exploring Chile and Argentina, photographer Joel Santos decided to travel to Bolivia in January 2017 to check the salt flats off his bucket list. With an electrical storm rolling in, Joel and his two travelling companions were the only souls left on the vast flats and captured the eerie flats without a person in sight. (Photo by Joel Santos/Barcroft Images)

Morenada dancers dance at the Plaza de Armas during the celebrations of the Morenada National Day in La Paz, Bolivia on September 7, 2021. (Photo by Manuel Claure/Reuters)

A woman rides a Vespa during the Annual Columbus day parade in New York on October 11, 2021. (Photo by Kena Betancur/AFP Photo)

General view of the atmosphere at the Halloween celebrating in city centre on October 29, 2021 in Newcastle, United Kingdom. (Photo by Newcastle New Projects)

Britney Spears supporter Phoebe Price and her dog Henry take pictures next to a “Free Britney” Christmas tree set by fans outside a hearing concerning the pop singer's conservatorship at the Stanley Mosk Courthouse, Friday, November 12, 2021, in Los Angeles. A Los Angeles judge ended the conservatorship that has controlled Spears' life and money for nearly 14 years. (Photo by Damian Dovarganes/AP Photo)

Chinese American actress Bai Ling arrives at the 58th Golden Horse Awards in Taipei, Taiwan, Saturday, November 27, 2021. Bai is a guest at this year's Golden Horse Awards, one of the Chinese-language film industry's biggest annual events. (Photo by Billy Dai/AP Photo)

Vegetarian 19-year-old model Courtney Stodden gets ready to serve veggie hot dogs wearing a lettuce bikini during a People for the Ethical Treatment of Animals (PETA) free veggie dog handout on Capitol Hill in Washington, DC, July 16, 2014. (Photo by Jim Watson/AFP Photo)