The newest additions to the tallest structures in the world are two rising structures in the Middle East.

The Tower at Dubai Creek Harbour – part of a vast waterfront development with completion scheduled ahead of Dubai’s Expo 2020 World Fair, which kicks off in October of that year. The Tower will be the heart of Dubai Creek Harbour, one of the largest tourist and lifestyle developments in the world, stretching across a whopping 2.3 square miles (six square kilometres).

Piercing through a canopy of clouds at 3,045 feet (928 meters), the complex’s main structure aims to take the title of world’s tallest, beating out the current title-holder, the Burj Khalifa, which is also located in Dubai. Yet, as an observation tower with less than 50% of its height occupied by usable floor area.

The Tower will not be considered a skyscraper and thus is ineligible for the list of the world’s tallest buildings. It could, however, take the title of the world’s tallest structure once complete – but it’s got competition.

Saudi Arabia’s Jeddah Tower, being developed by Jeddah Economic Company and Kingdom Holding, is also slated to finish in 2020. When completed, this gleaming vertical will stand at least 236 feet (72 meters) taller than Dubai’s upcoming creation, so if the supported-tower structure wants the world title, even for a short time, it has to open its doors before the Adrian Smith and Gordon Gill Architecture designed Jeddah Tower does.

The Tower is being constructed by Emaar Properties and will anchor the Dubai Creek development as a magnet for tourists. Designed by Swiss-Spanish architect Santiago Calatrava, it will feature The Pinnacle Room — an observation point offering 360-degree views of the city – and public vertical gardens, while 18 to 20 floors have been reserved for homes, restaurants, shops, and a boutique hotel.