World's 5 Mega Construction Projects - as part of the travel series by GeoBeats.

Around the world, we keep building structures that are taller and bigger than the existing ones. Here are 5 current mega constructions projects.

Number 5 is the Kingdom Tower in Saudi Arabia. Upon its expected completion in 2017, it will have an approximate height of 3,280 feet, making it the tallest building in the world. With a budget of nearly $1.2 billion, the tower will have more than 160 floors, including apartments, office space, and condos.

Number 4 - The Falconcity of Wonders in Dubai. With an area of 400,000 sq feet, this mega construction project would host the replicas of 7 wonders of the world such as Taj Mahal, Effiel Tower, and The Great Wall. In addition, it will feature a theme park, educational institute, sports facilities, and approximately 5,500 residential units. The project is expected to complete between 2015 and 2017.

Number 3 is the Shanghai Tower in Shanghai, China. Upon its completion in 2014, this 2074 feet structure would be the second tallest building in the world. The 121-story tower will have plenty of dinning, entertainment, and office space options. The mega construction project has a budget of $1.9 billion.

Number 2 is the Crystal Island in Moscow, Russia. With an approximate height of 1500 feet, this "tent-like" structure will comprise of apartment buildings, hotel, office, shopping, exhibition & performance space.

Number 1 is the 1 World Trade Center, which is part of the new World Trade Center complex in New York City. Upon its completion in 2015, the 1,776 feet tall building would not only be the tallest building in New York City but also in the US.

Which one of these is your favorite?