Tim Dunn takes to the tracks in Newcastle, to explore a city rich in railway architecture. He also looks at two recording-breaking structures in Scotland and marvels at the quirky design of a funicular in the German highlands.

Tim Dunn is in London exploring the striking stations of the Piccadilly Line's northern extension. Tim also takes a look at Causey Arch in County Durham.

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

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 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 Huddersfield's Grade I listed station and examines the station's clock, and visits Cologne's magnificent Hohenzollern Bridge in Germany.

Tim heads north of the border to scale a Scottish railway icon – the Forth Bridge, without doubt one of the engineering wonders of the world. Tim conquers his fear of heights to learn its story from its foundations, deep under the Firth of Forth, to its summit 110 metres above the water. At Goathland, North Yorkshire, is a railway station where movie magic was made, possibly better known today as Hogsmeade from its starring role in the Harry Potter films.

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

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 explores railway ingenuity at Goole swing bridge in Yorkshire and takes in Edinburgh Waverley from roof to underground vaults. At the National Railway Museum learns how railways demarked their land.

Tim Dunn visits Weymss Bay Station in Inverclyde - an architectural gem. He also explores the engineering marvel that is Blackfriars station in central London.

Tim goes deep beneath the waves to explore the Channel Tunnel, stopping off at Ashford International to take in this underappreciated piece of 90s railway architecture. Folkestone Harbour Station, once a great hub for international travel, is leading the way for the regeneration of a whole area of the town.

Tim visits the striking post-war Coventry station. In Scarborough he discovers the birthplace of Britain’s funicular railways. And in a TV first, Tim delves into Network Rail’s archives.

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 discovers how two competing Victorian railway companies shaped the city of Lincoln.

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 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 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 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 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 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.