People take part in a Halloween street party at Lan Kwai Fong on October 31, 2016 in Hong Kong. Halloween, a contraction of All Hallows' Evening, falls on the day before All Saints' Day on November 1, a holiday when Christians remember their deceased loved ones. (Photo by Lam Yik Fei/Getty Images)

Miss Universe candidate Rebecca Kathleen Rath from Belize walks on stage in her national costume during the Miss Universe preliminary show at the Mall of Asia Arena in Pasay City, south of Manila, Philippines 26 January 2017. (Photo by Rolex Dela Pena/EPA)

Corey Arnold is a fine art photographer and a commercial fisherman, working the stormy waters of the Bering Sea by Alaska. His latest work documents life in this remote wilderness, both at sea and on the shore, capturing trawlers, foxes, eagles and the grandeur of the scenery. “Aleutian Dreams” can be seen at Charles A Hartman Fine Art in Portland, Oregon, until 27 May. Here: “Roadside Friend”. (Photo by Corey Arnold/Charles A. Harman Fine Art/The Guardian)

Few people haven’t heard about the ancient city of Persepolis, which lies at the foot of the Mountain of Mercy (Kuh-I-Rahmat). In ancient times, Persepolis was the capital of the Achaemenid Empire. Regretfully, it was burned by the Greeks in 330 BC after they looted the immense treasure of this city. It is said that Greeks needed 5,000 camels and 20,000 mules to carry all the treasures from Persepolis. The only thing of Persepolis that has survived the wear of time is the ginormous stone terrace 530 by 330 meters adorned by elaborate stone sculptures. It is amazing how intricately detailed some of the sculptures are, despite the fact that they were created many centuries ago.

Villager search for a place for the roasted pigs in Dalem Temple at Timbrah Village on February 27, 2014 in Karangasem, Bali, Indonesia. Usaba Dalem is an annual ritual held by the people of Timbrah Village, during this ritual all the villagers will cook roasted pigs and carry them to Dalem Temple as an offering to God and an expression of gratitude for a successful harvest. (Photo by Putu Sayoga/Getty Images)

A protestor gestures during clashes with police during protests against planned fuel price hikes on March 27, 2012 in Jakarta, Indonesia. Thousands of Indonesians students in big cities all over the county gathered to protest the governments plans to increase the price of subsidized fuel by 30 percent. The Indonesian parliament is currently debating the fuel hikes which would go into effect March 25, 2012 if approved. (Photo by Ulet Ifansasti/Getty Images)

Wellcome trust employee Zoe Middleton poses behind an artwork entitled “My Soul” by Katharine Dowson, which consists of a laser etched lead chrystal glass formation in the shape of a brain, and was created using the artists own MRI Scan, at Wellcome Collection on March 27, 2012 in London, England. (Photo by Dan Kitwood/Getty Images)

An aerial view of a livestock enclosure of the Himba people, in October, 2014, in the Namib Desert, Namibia. A photographer has captured a bird's eye view of the stunning Namib Desert from a paraglider. Theo Allofs travels the world taking stunning pictures of untouched landscapes from a unique perspective. Soaring 300 metres above ground, Theo shot the yellow sand dunes, dry red river beds and remote townships in Namibia. (Photo by Theo Allofs/Barcroft Media)