Smithsonian HD Network SOFIA, the largest airborne observatory in the world, boasts a 17-ton telescope capable of making observations impossible for ground-based telescopes. 2026-05-06 On Europe's high-speed rail network, between Barcelona and Madrid, crews work to expand the infrastructure for a new train. 2026-05-06 We follow passengers and crew aboard Viking Star during its two-week tour from Barcelona to its home port in Bergen, Norway. 2026-05-06 The new Viking Sea cruise ship whisks guests away on a journey across the Arctic Circle and into the heart of Norway. 2026-05-06 VIA Rail's passenger train travels between Vancouver and Toronto on four-day, four-night journey that cater to everyone. 2026-05-06 Travel aboard the colourful trains of the State Railway of Thailand and explore the famed Death Railway; the trains travel through ancient areas, historic tunnels, and raging rivers. 2026-05-06 Take a cruise where the guests choose the ports to visit and the captain and crew work overtime to make it happen. 2026-05-06 The only cruise ship designed specifically to navigate the treasures and dangers at the southern tip of South America. 2026-05-06 Follow mega cruiser Regal Princess as she whisks guests to Germany, Russia, and Scandinavia in style. 2026-05-06 The Carnival Vista is the new flagship for one of the world's largest cruise lines, carrying more than 4,600 passengers and boasting 10 restaurants, nearly 2,000 staterooms and a crew of 1,400. 2026-05-06 Traveling to New York, Denver and Nice, France to visit Little Island, the Denver Museum of Art and La Tête Carrée; the secrets to how they were built is revealed. 2026-05-06 Visiting the Vancouver House, Norway's Under restaurant and the Seattle Central Library to discover how these visionary buildings were created. 2026-05-06 A towering bridge in France; upside-down hotel in China; Italy's forest into the sky. 2026-05-06 The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo. 2026-05-06 Building an eco-friendly visitor center in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse. 2026-05-06 Traveling from Canada to Belgium to the Southern U.S. to examine an eye-popping school, museum and railway station and reveal how they were built. 2026-05-06 Mike joins the Assault Craft Unit 5, the U.S. Navy's team for Landing Craft Air Cushions (LCACs); LCACs carry heavy vehicles and troops onto beaches; Mike helps fly & fix an overhauled LCAC during a U.S. Marines beach assault training mission. 2026-05-06 Nevada has over 40,000 abandoned mines posing dangers; Mike joins contractors for a week to secure five sites; alongside biologists, they explore and document wildlife; reaching these isolated mines requires barges, helicopters and bulldozers. 2026-05-06 A ride on the Panama Canal Railway reveals the track repairs, engine overhauls and dangerous searches involved in keeping vital freight runs rolling. 2026-05-06 A crew and its massive air crane helicopter haul millions of pounds of timber while battling the elements and handling emergency repairs. 2026-05-06 Uncovering the design and engineering secrets behind the Grand Canyon Skywalk, the Audain Museum and more. 2026-05-06 The inside stories behind a new, horseshoe-shaped complex in Rotterdam, a rock-shaped opera house in China and a makeover of the British Museum. 2026-05-06 Exploring the engineering and architectural masterpieces like The Copper in Manhattan to Gardens By the Bay in Singapore. 2026-05-06 Engineers grapple with an apartment building, ripped apart by a man-made canyon; the Gateway Arch takes shape in St. Louis; an unpromising plot in Copenhagen, Denmark, is transformed by a gleaming new triangular office. 2026-05-06 Alien port authority in Belgium; ultrathin skyscraper in Manhattan; hanging museum in Scotland. 2026-05-07 Experts examine how engineering failures allowed Hurricane Katrina to devastate New Orleans and cause the collapse of the Tacoma Narrows Bridge. 2026-05-07 Human flaws cause three plane crashes in England, Colorado and Minnesota. 2026-05-07 On 21 February 2008, Santa Bárbara Airlines Flight 518 strays off course and flies into the side of a mountain shortly after takeoff. 2026-05-07 Garuda Indonesia Flight 152 crashes into mountainous woodlands while trying to land at Polonia International Airport in Medan, North Sumatra, in low visibility. 2026-05-07 A look at the fate of United Airlines Flight 232 which crashed into Sioux City's runway in 1989; it caused a subsequent explosion that left 111 people dead. 2026-05-07 Three catastrophic runway collisions raise the same pressing question; a look at how two planes end up on the same runway at the same time. 2026-05-07 Featuring captivating reenactments and state-of-the-art CGI; Air Crash Investigation uncovers the truth behind the most legendary aviation disasters of all time. 2026-05-07 An investigation into a jet crash from 2008 leads to a drastic change into the Russian aviation system. 2026-05-07 A U.S. military plane veers off course and flies into a mountain while attempting to land at Dubrovnik Airport in Croatia in heavy fog, killing all 35 people on board. 2026-05-07 A comprehensive look at the naval battle of Guadalcanal in November 1942 and the heroic efforts of U.S. sailors who held off powerful Imperial Navy. 2026-05-07 The evolution of amphibious assault vehicles, including the restoration of Britain's last surviving LCT 7074 landing craft, designed to carry six Churchill tanks. 2026-05-07 A look at how the role of battleships changed over the course of the First and Second World Wars. 2026-05-07 From tests in the River Thames, to the German's deadly U-boat attacks in World War II, this episode explores the silent threat of submarines. 2026-05-07 Stories of espionage at sea, including deadly U-boat cat-and-mouse games during WWI, the sinking of the Lusitania, a gun-smuggling private yacht that made history, and liners turned troopships. 2026-05-07 The legendary Battle of Trafalgar in 1805, which pitted Napoleon's French ships against a British armada under the command of Admiral Horatio Nelson. 2026-05-07 A look at how the art of deception was used by naval forces in the first half of the 20th century; in 1939, the German raider Atlantis is equipped with fake funnels, while its sailors dressed as women pushing prams to fool Allied merchant ships. 2026-05-07 Revolutionary ship design helped Sir John Hawkins and Sir Francis Drake lead England to defeat the Spanish Armada and become a world power. 2026-05-07 A look at Naval warfare's fastest combat ships and how the advantage of speed determined the outcome of some of the great seas battles of the last 150 years. 2026-05-07 Bad design, human error and the enemy sent great ships to tragic ends, like Britain's K13 submarine and HMS Hood, Sweden's 17th century Vasa, and Kublai Khan's fleet, sunk by the original kamikaze. 2026-05-07 Innovative engineering allows the P-38 Lightning to fly faster and climb higher than any other WWII warplane; a twin-propeller fighter with heavy armaments packed into its nose, the P-38 becomes one of America's premiere combat planes during the war. 2026-05-07 The AH-64 Apache, one of the most heavily fortified and well-armed helicopters ever built. 2026-05-07 Exploring the history of the F-18 and how the U.S. Navy's dual-role aircraft has dominated both the air and the battlefields for over three decades. 2026-05-07 The inside story of the Harrier, the world's most famous short takeoff and vertical landing fighter jet. 2026-05-07 During the Vietnam War, the United States needed a helicopter that could defend itself; the AH-1 Cobra, the world's first pure attack helicopter. 2026-05-08