If you're not physically able to climb a mountain, short on time or just plain lazy, those industrious, railway-obsessed Victorians have gifted you an alternative. Opened in 1896, the Snowdon Mountain Railway is the UK's highest – and its only public – rack-and-pinion railway. Vintage steam and modern diesel locomotives haul carriages from Llanberis up to Snowdon's summit in an hour.
Return trips involve a scant half-hour at the top before heading back down again. Single tickets can only be booked for the journey up (adult/child £22/17); if you want to walk up and ride down, you'll have to hope there's space. Tens of thousands of people take the train to the summit each season: make sure you book well in advance or you may miss out. Departures are determined by customer demand and are weather dependent. From March to May (or during high winds) the trains can only head as far Clogwyn Station (adult/child £19/13) – an altitude of 779m.