Cast Iron Bathtubs

Find out how wall beds, sundae cups, digital paintings, and badminton rackets are made.

On this special episode of How It's Made, we countdown some of the most essential things for Thanksgiving dinner.

At almost two miles, the Rion-Antirion Bridge is an engineering colossus.

The HMS Queen Elizabeth boasts a flight deck larger than two soccer fields.

Soaring over 2,000 feet into the sky, the Shanghai Tower is the second tallest building in the world, and a futuristic engineering marvel. Discovery how cutting-edge technology means that the building's occupants will never feel it sway.

The Kansai International Airport in Osaka Bay, Japan, is built on the largest man-made island in the world. Discover how engineers built an artificial island on top of clay seabed to make the most daring engineering project of modern times a success.

The Shanghai Maglev is the fastest passenger train on the planet.

While being serviced, an Airbus A380 shows why it's an engineering marvel.

A rugged ship built to withstand tsunami size waves travels on a highway unlike any other in North America. A fleet of machines combats a massive flood in the Arctic Circle. And the biggest, most powerful wind turbines in Alaska.

The Yeti, a machine with 588 sharp teeth, helps keep the coldest airport in America running. Mighty tugboats chew through ice chunks in Alaska. And soldiers become Arctic warriors in the coldest army post in the country.

On the remote island of Sitka, Alaskan engineers construct a giant dam to power the town. Ride on a dangerous mission on the world's largest helicopters. Alaska's biggest boat lift hauls a 400-ton fishing ship in high winds.

Alaska's Coast Guard fights the most dangerous waters in the state to maintain buoys standing three stories tall. Explosive machinery yields big rewards 800 feet below Alaska's surface. An army of Alaskans build a steel ferry, several tons at a time.

A unique barge carries an entire train along Alaska's high seas. A mega fish factory on a remote island churns out 3 million pounds of seafood a day. A flying ambulance saves lives 14,000 feet above Alaska's wilderness.

Only in Alaska can you find an airport made from nothing but water and ice. Hardy vehicles brave the arctic to travel across the tundra. And next to a field of moose, 16 missiles stand by to prevent a nuclear disaster.

We have a DIY guide for building land speed racers.

At Jimmy’s Junk, inventors are looking for parts to complete what appears to be a jet-propelled merry-go-round. Later, shop regular Hale Storm tries to sell Jimmy an African Birthing Chair and a gigantic piece that could take the yard to new heights.