Glen Ogle Viaduct

The viaduct itself is the walk, really. Glen Ogle Viaduct near Lochearnhead is a proper Victorian engineering marvel - ten arches spanning 400 metres across a Highland glen, built in 1899 to carry the railway line through terrain that probably shouldn't have had one. Today the tracks are long gone, but the structure remains, and locals have converted the old railway bed into a walking route that's worth the trip.

The approach is straightforward enough. You park near Lochearnhead and follow what used to be the line, walking directly onto the viaduct itself. That's when the magic hits - you're walking across this thing, no handrails, no nonsense, just stone and sky and a proper drop below. The views west towards Loch Earn and the broader Highlands are genuinely striking, though the viaduct's engineering is what keeps your attention. Those arches are hefty work.

Honestly, it's not a full day out by itself. Allow two hours if you're leisurely, less if you're just there for photographs and the novelty. Families with decent walkers will manage fine, though younger kids might find the exposure unnerving. History enthusiasts will get more from it if they know about the railway's sad story - it closed in 1965.

Pair it with Balquhidder Braes Holiday Park, just three miles south, and you've got something solid. Use the viaduct as a morning walk, then settle in for proper loch scenery. Spring through autumn is best - winter can turn the path slippery.