1: Dubai's Burj Khalifa is the tallest building in the world, but perhaps not for long. Saudi Arabia has announced plans to build a 1 kilometer (3,280 foot) tower into the sky, to be named the Jeddah Tower, scheduled for completion in 2020. The Burj Khallifa currently stands at 2,716 ft. (Photo by Matthias Seifert/Reuters)

A hot air balloon in the likeness of Yoda from Star Wars prepares for liftoff at the 21st Philippine International Hot Air Balloon Festival at the former Clark US Air Force base in Pampanga Province, Philippines on February 9, 2017. (Photo by Xinhua News Agency/Rex Features/Shutterstock)

The Bridge “Rakotzbrücke” is pictured against trees in autumn colours in the the eastern German town of Kromlau November 4, 2014. (Photo by Hannibal Hanschke/Reuters)

The fourth annual BigPicture Natural World Photography Competition aims to celebrate the diversity of life on Earth, and encourages people to protect and conserve it. Here: “The Salmon Catchers”. Terrestrial Wildlife. To capture this view of a mother grizzly bear and her cub, photographer Peter Mather set up a camera trap on a log that he knew the bears tended to traverse while fishing for salmon, in the Yukon River watershed in Canada. (Photo by Peter Mather/BigPicture Natural World Photography Competition 2017)

Switzerland's Lea Sprunger in action during the 300m hurdles race during the Weltklasse Zurich Inspiration Games, a virtual international athletics meeting with 30 athletes in eight disciplines at seven venues worldwide, in the Letzigrund stadium in Zurich, Switzerland, Thursday, July 9, 2020. (Photo by Arnd Wiegmann/Reuters)

The sun rises through the thick fog that covers the city of Frankfurt, Germany, Friday, November 12, 2021. (Photo by Michael Probst/AP Photo)

France's Alize Cornet falls down during her women's singles tennis match against Kazakhstan's Elena Rybakina on the fourth day of the 2023 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on July 6, 2023. (Photo by Glyn Kirk/AFP Photo)

This is the moment fog rolls through a valley making trees disappear as if covered by giant waves in a sea. The fog was rolling in over the sub-alpine mountain range of the Jura Mountains in Switzerland, February 2023. (Photo by Rainer Awiszus-Emser/Solent News & Photo Agency)