How did engineers build the tallest bridge on the planet? As tall as a skyscraper, the Millau Viaduct braves deadly wind speeds over an immense abyss, and we go inside the story behind this modern wonder.

The AT and T Stadium in Texas is home to the Dallas Cowboys and the world's largest retractable roof. This $1.2 billion stadium can house over 100,000 fans, and we'll go inside how this engineering feat was built.

China's Three Gorges Dam is the largest and heaviest concrete structure on earth, and it produces more power than any hydroelectric dam ever built. Discover how engineers reshaped a river to accomplish this incredible engineering feat.

How did engineers move mountains to build the longest and deepest rail tunnel on the planet? Discover how 25 million tons of rock were moved to build this modern wonder, the Gotthard Base Tunnel.

Go inside the largest cruise ship on the planet: MS Harmony of the Seas. A massive ship that's 1,181 feet long and a staggering 227,000 tons.

The Virginia Class is one of the most advanced nuclear powered, fast attack submarines ever produced for the US Navy. These technological titans are almost 400 feet long, and weigh a staggering 7,800 tons.

The Shard, a 73-story glass skyscraper in London, has 11,000 exterior glass panels, a colossal concrete core that supports luxury apartments, a hotel, and close to 600,000 square feet of office space.

The world's toughest trains have conquered deadly jungles, deserts, and mountains, and were made possible by expert engineering and cutting-edge technology.

The world's busiest cities are kept running by innovative train systems built with expert engineering and cutting-edge technology.

The world's most incredible trains cross deadly canyons and chasms of terrifying heights, and were made possible by expert engineering and cutting-edge technology.

The world's most incredible trains have conquered dangerous oceans and seas, and were made possible by expert engineering and cutting-edge technology.

A look at the incredible machines built to get troops directly to the front line, on land, at sea and in the air.

The Independent, a residential skyscraper in Austin, Texas. At 690ft, it is the tallest building in the city, surpassing the 683ft Austonian, another residential skyscraper.

A look at the world's biggest oil tanker - the mighty Supertanker Europe of the record-breaking TI Class of ship.

A look at the Beijing Daxing, set to become the biggest airport in the world, designed to accommodate a staggering 100 million travellers each year.

The skinniest skyscraper on earth is being built in New York City. Can engineers find a way to build this ultra-tall slender building?

The Falkirk wheel is the first and only rotating boat lift, capable of moving 600 tonnes of boat and water over a 25-metre height difference in just minutes.

Stratolaunch is designed to lift rockets, spacecraft and experimental high-speed hypersonic planes into the stratosphere, then release them for their onward journey into space.

The world's largest heavy-left ship can carry entire cruise ships halfway across the globe without stopping, and to do this, experts use cutting-edge maritime engineering and the latest science for herculean strength and first-class maneuverability.

For NASA to send a person to Mars, they will need to build the most powerful rocket ever built. Discover inside story behind the Orion Space Craft, an engineering feat designed to sustain astronauts for years in one of the universe's harshest environments.

The Tesla car factory is one of the largest and most innovative factories in the world. This state-of-the-art facility is the home to high-tech robots that work around-the-clock to produce thousands of cutting-edge electric cars each week.

The HMS Queen Elizabeth aircraft carrier has a surface area larger than two soccer fields, and is stocked with cutting edge F35 fighter jets. Discover how this megaship ticks inside and out.

Explore three battlefield behemoths that command land, sea and air.

A brand-new skyscraper in Texas is a gravity-defying engineering marvel with a one-of-a-kind shape, and to build it, experts use cutting-edge construction and design that pushes modern-day tower-building to strange and innovative heights.

Engineers in China are constructing the largest and most ambitious water transfer project in human history, defying nature to move vast quantities of water from the south to the dry north in Beijing, all without the use of pumping stations.