Tim Dunn visits the Ribblehead Viaduct in the Yorkshire Dales, talks to the man who saved it from closure and tours the breathtaking stations of the Hungerbergbahn in Innsbruck.

Tim Dunn visits the former HQ of London Underground, 55 Broadway, which was the capital's first skyscraper, and sees the timber-framed Barmouth Bridge in north Wales.

Tim Dunn visits Swindon's railway village, which became home to Great Western's enormous works and he also explores the dark and secret past of Milan's monumental station.

Tim Dunn visits the architecture of the Stockton & Darlington railway, the first passenger steam line in the world and learns how Essex's enormous Chappel Viaduct was built.

Tim Dunn explores the ornate St Pancras station in London and its sister hotel - built to show off the might of the Midlands, and learns about Castle Howard station in North Yorkshire.

Tim Dunn follows his family's roots by exploring Metroland, the area around the Metropolitan Railway, and in Great Malvern learns about the woman behind the decorative 1860s station.

Tim Dunn rides up Mt Snowdon's railway to visit the summit station, and discovers how a glass structure envelopes Strasbourg's 19th century station.

Tim Dunn explores disused tube station Down Street in Mayfair that played a crucial tactical role during WWII and tours Rotterdam's new centraal station with the man who designed it.

Tim's behind the scenes at London's King's Cross and learns of Bristol's funicular railway.

Tim Dunn visits the Ffestiniog in Wales originally built to transport slate from mountain to coast and learns about Amsterdam Centraal - controversially built across the waterfront.

Tim heads underground at the magnificent Bramhope Tunnel and looks at architectural salvage on a grand scale at Fawley Hill. In Germany, Tim finds out how Dresden Station finally rose from the ashes after WW2.

Tim visits Sheffield station which been reinvented for the 21st century. He also helps to restore the Bennerley Viaduct in the Erewash valley.

Tim uncovers the secrets above, below and inside London’s Charing Cross Station. He also looks at the modern wonder of the Ordsall Chord in Manchester and tells the tale of two stations in the Swedish town of Boras.

Tim Dunn explores the birthplace of British locomotive manufacturing - Leeds, starting at the Round Foundry.

Tim explores the last working roundhouse in the UK - Barrow Hill in Derbyshire. Tim also visits Bath, a city renowned for its Georgian architecture.

Tim gets to grips with his local station – London Bridge, meeting the architects who turned this one-time Frankenstein’s monster of a station into the bright, airy and tranquil modern terminus. At the National Railway Museum, Tim gets access to Borough Market Junction Signal Box.

Tim Dunn takes a trip through the history of the North Staffordshire Railway Company, admiring the beautiful Stoke Station.

Tim Dunn visits the historic Grade 1 Curzon Street Station, to be reborn as part of the terminus for HS2, the rail link between London and Birmingham

Tim Dunn visits the Royal Albert Bridge and finds out how it was constructed. He also visits Wolverhampton to learn about the history of its train stations, old and new.

Tim Dunn rides on a funicular railway powered by water. Also, how an abandoned Victorian railway tunnel in Northamptonshire is being transformed into a racetrack.

Tim Dunn goes behind the scenes at Bristol Temple Meads, a Grade 1 listed station, and is given special access to Brunel's old Tudor station and boardroom.

Tim Dunn explores Wingfield, one of the oldest surviving railways and uncovers the longest brick viaduct in the UK, the Welland Viaduct in Northamptonshire.

Tim Dunn explores Brunel’s first and last railway projects and looks at a Scottish station with a royal connection. Later he takes in the delights of a Portuguese station which looks more like a palace than a railway terminus.

Tim visits Bishopstone, a seaside station that’s also a WW2 fortress, and looks at the UK’s first ever high-speed line – the Selby Diversion. He also finds out how the Swedes built a station in a city made up of 14 islands.