A photograph released to Reuters on August 22, 2014 shows the remains of an ancient Mayan city in Lagunita May 30, 2014. Archaeologists have found two ancient Mayan cities hidden in the jungle of southeastern Mexico, and lead researcher Ivan Sprajc, an associate professor at the Research Center of the Slovenian Academy of Sciences and Arts, says he believes there are “dozens” more to be found in the region. (Photo by Reuters/Research Center of the Slovenian Academy of Sciences and Arts)

This file photo provided on Sunday February 15, 2015 by the Syrian anti-government activist group Aleppo Media Center (AMC), which has been authenticated based on its contents and other AP reporting, shows Syrian rebels firing locally made shells against the Syrian government forces, in Aleppo, Syria. (Photo by AP Photo/Aleppo Media Center)

A physically disabled fox walks with its walking wheels wheelchair, developed by an animal lover by Van Yuzuncu Yil University Wildlife Conservation and Rehabilitation Center, after the fox found wounded in the urban countryside in Van, Turkey on December 05, 2020. The fox also received a physical treatment at the center. (Photo by Ozkan Bilgin/Anadolu Agency via Getty Images)

A handout photo made available by Indonesia's Center for Volcanology and Geological Hazard Mitigation shows hot lava spewing from Mount Ibu in North Maluku province, Indonesia, 04 July 2024 (issued 05 July 2024). The Center for Volcanology and Geological Disaster Mitigation (PVMBG) advises the community around Mount Ibu and visitors not to carry out activities within a radius of 2.0 kilometers and a sectoral expansion of 5 kilometers towards the crater opening in the northern part of the active crater of Mount Ibu. (Photo by PVMBG/EPA)

A ballet student from the Kibera based Project Elimu poses ahead of a public show in Kibera on August 14, 2024. Project Elimu, a community driven non profit organization, provides afterschool art, sport education programs for young people age 3 to 22. During school holidays the center holds street perfomances to encourage more students to join the dance center. Kibera is the largest slum in Nairobi, one of the largest in Africa. (Photo by Gordwin Odhiambo/AFP Photo)

New York City Mayor Michael Bloomberg gets on a custom made World Trade Center inspired motorcycle in front of the 9/11 Memorial Preview Site on October 5, 2011 in New York City. The motorcycle was designed by Paul Teutul Jr. of the television show “American Chopper” and was built to commemorate the rebuilding of the World Trade Center Site. Another motorcycle, nearly identical to the one unveiled, will also be built by Paul Jr. and raffled to raise money for the 9/11 Memorial. (Photo by Spencer Platt/Getty Images)

Scandinavia, always ahead of the bike infrastructure curve, has something else to share: a self-service cycle lift for hilly roads.

This undated photo shows the Arctic National Wildlife Refuge in Alaska. (Photo by U.S. Fish and Wildlife Service/Getty Images)