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The World’s Biggest Construction Projects Happening Right Now

From desert megacities to mile-high skyscrapers, some of the biggest construction projects in human history are underway right now. These aren’t your average building sites—they’re multi-billion dollar efforts that are literally reshaping landscapes, pushing technology to the edge, and rethinking how we live, travel, and use resources.

Here’s a look at the largest and most ambitious construction projects happening around the world in 2025—and why they matter.

1. The Line – Neom, Saudi Arabia

Let’s start with one of the most talked-about projects of the decade—The Line. Part of Saudi Arabia’s futuristic Neom city, The Line is basically trying to reinvent how cities work. Imagine a 170-kilometre-long, mirrored linear city with no cars, no roads, and zero carbon emissions.

Instead of sprawl, everything in The Line will be vertically stacked—homes, schools, offices, even parks—all within a five-minute walk. And getting around? That’ll be handled by an underground high-speed rail, with end-to-end travel promised in just 20 minutes.

Why it’s a big deal:
This isn’t just another smart city. If it works, The Line could be a blueprint for high-density, sustainable urban living in the future.

Where it’s at:
Construction is well underway with excavation already stretching across the entire 170km route. Over 100,000 workers are on-site, and major structural components are starting to rise from the desert.

2. Jeddah Tower – Saudi Arabia

Saudi Arabia features again with another record-breaking ambition: the Jeddah Tower. When finished, it’s expected to stand over 1,000 metres tall—making it the world’s tallest building by far, even dwarfing the Burj Khalifa.

Originally launched in 2013, the tower’s journey hasn’t been smooth. Construction stalled due to political and economic challenges, but in 2024, work restarted in earnest.

Why it’s a big deal:
Jeddah Tower isn’t just about breaking height records. It’s the centrepiece of a huge development—Jeddah Economic City—which will feature homes, offices, shopping, and tourism hubs.

Where it’s at:
Back on track as of January 2025, with new deadlines set for completion by 2028.

3. South–North Water Transfer Project – China

Not every mega-project is a skyscraper. China’s South–North Water Transfer Project is a jaw-dropping engineering effort designed to fix one of the country’s biggest challenges: water scarcity in the north.

This enormous system of canals, tunnels, and reservoirs will eventually move nearly 45 billion cubic metres of water annually from the water-rich south (mainly the Yangtze River) to the drier north.

Why it’s a big deal:
It’s one of the most ambitious infrastructure projects in history—comparable in scale to the Three Gorges Dam—and critical for China’s long-term agricultural and industrial stability.

Where it’s at:
The eastern and central routes are already operational, and the western section is still in development.

4. Medog Hydropower Station – Tibet, China

Sticking with China, another project drawing global attention is the Medog Hydropower Station on the Yarlung Tsangpo River in Tibet. This isn’t just any dam—it’s poised to become the largest hydroelectric plant in the world.

Once complete, it’ll have a massive 60 gigawatts of capacity and could generate 300 billion kWh of electricity annually. That’s enough to power entire regions and significantly cut carbon emissions.

Why it’s a big deal:
This dam will help China meet its ambitious clean energy goals while supporting rapid industrial growth.

Where it’s at:
Approved in 2024, with construction kicking off soon. It’s expected to be fully operational by 2033.

5. Rise Tower – Riyadh, Saudi Arabia

You thought Jeddah Tower was ambitious? Meet the Rise Tower—a proposed 2-kilometre-high skyscraper in Riyadh. Yes, you read that right. Two thousand metres tall. If completed, it would be twice the height of the Burj Khalifa and the tallest structure ever built by humanity.

Part of the massive North Pole development plan, the Rise Tower is still in its early planning phases.

Why it’s a big deal:
More than a vanity project, Rise Tower is being pitched as a global icon and a mixed-use space packed with hotels, restaurants, and observation decks.

Where it’s at:
Designs were revealed in 2023. The project is still conceptual, but if greenlit, it could break ground later this decade.

6. Al Maktoum International Airport Expansion – Dubai, UAE

Already home to the world’s busiest airport, Dubai isn’t slowing down. The Al Maktoum International Airport (aka Dubai World Central) is undergoing a staggering expansion to turn it into the largest airport on the planet.

The upgraded hub will eventually handle over 200 million passengers per year and have capacity for 200 wide-body aircraft at once.

Why it’s a big deal:
This expansion cements Dubai’s status as a global aviation powerhouse and a key stopover point between East and West.

Where it’s at:
Delayed due to funding and pandemic-related issues, but planning for the second phase—worth over $30 billion—is ongoing.

7. Dubailand – Dubai, UAE

Dubailand is one of those “wait, it’s still going?” projects—but yes, it’s still alive and kicking. This enormous entertainment complex is planned to be nearly three times the size of Walt Disney World. Think theme parks, resorts, shopping districts, sports arenas, and even eco-tourism zones.

Launched way back in the early 2000s, it faced major setbacks after the 2008 financial crisis but has seen renewed interest in recent years.

Why it’s a big deal:
If completed as planned, Dubailand could easily become the world’s top tourist destination—drawing in millions annually.

Where it’s at:
Parts of the project are operational (like IMG Worlds of Adventure), and other phases are being reevaluated with more modern, sustainability-focused design.

8. HS2 – United Kingdom

Back in the UK, HS2 (High Speed 2) is one of Europe’s largest infrastructure projects. It’s a new high-speed rail line that will connect London to Birmingham, Manchester, and potentially Leeds—with trains hitting speeds up to 250 mph.

The goal? Slash travel times, boost northern economies, and take pressure off the existing rail network.

Why it’s a big deal:
While controversial for its cost and environmental impact, HS2 could reshape UK transport for decades to come.

Where it’s at:
Construction is full steam ahead on Phase 1 (London to Birmingham), with key tunnels and viaducts now visible along the route. Later phases remain under review.

9. Mumbai Coastal Road – India

Mumbai’s infamous traffic congestion is finally being tackled with one of India’s biggest urban projects: the Mumbai Coastal Road. This 22-kilometre, multi-lane highway will run along the city’s western coastline, cutting commute times and easing pressure on the city’s crammed inner roads.

Why it’s a big deal:
It’s not just a road—it includes sea walls, tunnels, and green spaces to help with flooding and climate resilience.

Where it’s at:
Slated for completion in phases starting 2025. Large portions of the project are already paved and connected.

10. Chuo Shinkansen Maglev – Japan

Japan is reinventing high-speed rail again with the Chuo Shinkansen—a maglev (magnetic levitation) line connecting Tokyo and Nagoya. Trains on this line will travel at up to 500 km/h (311 mph), making it the fastest passenger rail service in the world.

Why it’s a big deal:
Maglev tech reduces friction and energy use, making transport faster and greener.

Where it’s at:
Construction is ongoing, with a planned opening in 2027. There have been some local opposition and environmental concerns, but the core route is progressing.

Final Thoughts

Across the world, construction has never been more ambitious. Whether it’s tackling climate change, solving urban congestion, or aiming for the clouds (literally), these projects are redefining what’s possible in design and engineering.

Some may seem like vanity efforts. Others have clear practical goals. But all of them reflect one undeniable truth: humans are still dreaming big—and building even bigger.

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