How do these announcements stack up against what's already out there?
We've compiled 25 of what we think are some of the most impressive engineering/construction achievements to date, taking into consideration the era in which they were built and the knowledge and materials that were available to the designers.
Many of these were inspired by the human impulse to travel, and those that weren't can now be enjoyed by travelers today.
Engineering can of course also include electronics and other micro feats -- arguably computers and smartphones are among the most successful, popular and influential pieces of engineering ever created -- but we're interested here in big, bold and brave.
Click through the gallery to see our selection, then let us know if you have any further additions in the comments.
The Palm, Dubai, UAE
The Palm islands comprise approximately 100 million cubic meters of rock and sand. In total, 210 million cubic meters of rock, sand and limestone were reclaimed (through dredging) to create the islands, with 10 million cubic meters of rock used in the outer ring alone. The rocks used for both islands were transported from 16 quarries throughout the UAE and the materials used are enough to build a wall that could circle the world three times. Completion date: September 24, 2008.
There are several tour operators within Dubai offering boat tours of the Palm.
Aqueduct of Segovia, Segovia, Spain
The Aqueduct, one of the Iberian Peninsula's best preserved ancient monuments, features 44 double arches (or 88 when counted individually) and 79 single arches -- a total of 167. It was built during the reign of Roman Emperor Trajan and is still in use today, carrying water from the Frío river to the town of Segovia. The bridge, which consists of 24,000 granite blocks, was constructed without the use of mortar and each of its 167 arches is more than nine meters high. Completion date: AD 50.
Segovia is an easy day trip from Madrid and can be reached by both train and bus.
Great Wall of China, China
The Great Wall of China is 8,850 kilometers long (5,500 miles) and was constructed over a period of 2,000 years. Construction began in 475 BC, to protect China from the invading Huns. During the Ming dynasty, between 1368 and 1644 A.D, it was given a makeover, with the addition of watchtowers, battlements and cannons -- some of which stand 980 meters above sea level. The mortar used to bind the stones of the wall is made from rice flour. Completion date: 204 BC.
Beijing International airport is the closest airport to any point of the Great Wall of China -- it's just a short taxi ride to the section known as Badaling Great Wall and there are also regular bus services.
Taj Mahal, Agra, India
As many as 28 different varieties of semi-precious and precious stones were used to adorn the exterior of the Taj Mahal.
Trans-Siberian railway, Russia
The Trans-Siberian Railroad connects Moscow and Eastern Russia with Japan, China and Mongolia.
The full journey starts in Moscow and ends in Vladivostok, but passengers can join at numerous towns and cities en route.
Burj Khalifa, Dubai, UAE
The Burj Khalifa has a height of 828 meters and is both the tallest building in the world and the tallest free-standing structure in the world. Engineers faced multiple challenges, including the strong winds that batter the tower. Because of this, over 40 wind tunnel tests were conducted, not just to determine how the wind would affect the building but also to test the cranes used to construct it. Completion date: January 4, 2010.The Burj Khalifa is located in downtown Dubai and is well-connected by public transport.
Akashi Kaikyō Bridge, Akashi Strait, Japan
It took 2 million workers 10 years to construct the Akashi Kaikyo Bridge.
White Pass and Yukon Route Railroad, Canada
Built during the Klondike Gold Rush and financed largely by British investors, the "railroad built on gold" was constructed in just 26 months, using 450 tons of explosives to blast through Canada's coastal mountains. Passengers should hold on tight -- the railroad climbs almost 278 meters in just 32 kilometers and has numerous other steep gradients of up to 4%.
International Space Station
The International Space Station cost $100 billion to build and involved 100,000 people in 15 nations. It also ranks as one of the more unusual construction sites, located 354 kilometers (220 miles) above Earth. The hazards faced by those carrying out maintenance go far beyond a falling hammer or nail gun injury -- one tiny rip in a protective spacesuit means instant death. Completion date: Ongoing.Astronaut qualifications and a rocket.
Panama Canal, Panama
The Panama Canal is best explored by organized boat tour, but Panama City's Tocumen International Airport is the nearest airport.
Taipei 101, Taipei, Taiwan
Take the Taipei MRT-Bannan Line to MRT Taipei City Hall Station. From there, walk towards Xinyi Road from exit number two to Taipei 101.
Grand Canyon Skywalk, Arizona, United States
The nearest airports are Phoenix Sky Harbor Airport (PHX), or the Las Vegas Airport(LVS). It takes around two hours to drive to the Skywalk from Las Vegas, but organised tours which depart from the city are also available.
Shanghai World Financial Center, Shanghai
The building is a 20-minute walk from Dongchang Road Pier. The nearest subway station is Lujiazui Station.
Millau Viaduct, Millau, France
The nearest train station can be found in the town of Millau, which is well connected to cities and towns throughout France. The closest airport is Rodez-Marcillac -- a 25-minute drive away.
London Underground, London
London's Heathrow Airport is connected to the London underground.
Kansai Airport, Osaka, Japan
Kansai International Airport is connected to most of the major international hubs. Osaka is two hours from Tokyo on the Shinkansen bullet trains.
Hoover Dam, Arizona/Nevada, United States
The nearest airport is in Las Vegas, 32 miles away.
Great Pyramid of Giza, Egypt
There are regular bus services from the centre of Cairo and it's also just a short taxi ride.
Golden Gate Bridge, San Francisco
There are regular buses to the bridge from downtown San Francisco, Marin County and Sonoma County.
Eiffel Tower, Paris
The closest Paris Metro station to the Eiffel Tower is Champ de Mars.
Confederation Bridge, Prince Edward Island, Canada
Travel to Prince Edward Island by ferry from New Brunswick. Charlottetown Airport is the island's largest airport.
There are regular buses to the site, and it's also possible to get there by tram -- look for the "Colosseo" stop.
CN Tower, Toronto, Canada
The CN Tower is in the heart of downtown Toronto. There are regular buses to Bremner Boulevard, where the tower is located.