Tim Dunn explores disused tube station Down Street in Mayfair that played a crucial tactical role during WWII and tours Rotterdam's new central 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 Dunn goes behind the scenes at London's Kings Cross station and finds out about the disused funicular railway hidden in the Avon Gorge in Bristol, blasted out of the cliff.

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

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.