A UNESCO-listed fortress capital perched over a plunging river gorge, one Supercharger stop each way near Metz, and the only country on Earth where every bus and train is free — a genuinely different kind of extended weekend.
Luxembourg City is a genuine oddity in Europe: a tiny, fabulously wealthy fortress capital built on a rocky spur above the deep gorges of the Alzette and Pétrusse rivers, riddled with 17km of underground casemate tunnels blasted into the cliff by Habsburg and French engineers. The old town and its fortifications are UNESCO World Heritage. Walk the ramparts on the free Chemin de la Corniche ("Europe's most beautiful balcony"), drop down into the half-timbered lower towns of Grund and Clausen by the river, and — uniquely useful for a car camper — every bus, tram and train in the entire country has been free since 29 February 2020, the first nationwide fare-free public transport system in the world. Park once, ride everywhere.
Sources: Ville de Luxembourg — free public transport, LuxToday — why transport is free, Visit Luxembourg City — Chemin de la Corniche
Meudon-la-Forêt → Luxembourg City is about 363 km, roughly 3h40–4h of driving via the A4/A31 through Reims/Metz. That's beyond the realistic ~330–370 km range of a 97%-SOH Model Y Premium, so plan on one Supercharger stop each way, timed with the Metz area roughly two-thirds of the way there.
Once in Luxembourg, motorways are toll-free — only French autoroute tolls apply on the way there (budget roughly €20–30 each way for A4/A31 tolls, standard French autoroute rates).
Sources: Tesla — Metz Sud Supercharger, Tesla — Hauconcourt Supercharger
Leave early, charge at Hauconcourt (or Metz Sud) roughly two-thirds of the way, then continue north to Luxembourg City. Set up camp first (see lodging below), then walk into the old town: the Bock Promontory — the original 963 AD fortress site — and the entrance to the Bock Casemates, 17km of tunnels carved into the rock, once housing bakeries, slaughterhouses and thousands of soldiers. Evening walk along the free Chemin de la Corniche for sunset views over the Alzette gorge and the Grund below.
Morning inside the Bock Casemates properly — self-guided audioguide visit is roughly €9 for adults (children 4–12 around €5.50, under 4 free); a full guided tour package runs closer to €20. If you're planning to see several paid sights, the Luxembourg Card bundles free entry to the Casemates and other attractions plus free transport (useful, though transport itself is already free nationwide). Descend into Grund, the pretty riverside lower town below the cliffs, and Clausen next to it — both full of old stone buildings, breweries-turned-bars, and views straight up at the ramparts above. This is also where the flat riverside paths along the Alzette valley begin — good bike or walking terrain, in sharp contrast to the steep stairs and lifts connecting upper and lower town.
Sources: Visit Luxembourg — Bock Casemates, Bock Casemates ticket/hours overview
Ride or walk the Pétrusse valley park below the Adolphe Bridge — another green gorge cut right through the city, connecting to the Alzette valley paths. Use the free buses/tram to shuttle back up to the plateau if you don't feel like climbing. In the evening, treat yourself to Luxembourg's signature dish: Judd mat Gaardebounen (smoked pork collar with broad beans and potatoes), typically €22–28 at traditional addresses like Brasserie du Cercle (Place d'Armes) or Um Dierfgen. Luxembourg is genuinely expensive — this is the one splurge meal of the trip, everything else self-cooked.
Morning coffee overlooking the gorge one more time, then retrace the route home, charging again at Metz Sud or Hauconcourt on the way through.
Sources: park4night — Roeser free aire, park4night — Rue des Glacis, camping.info — City-Camping Kockelscheuer, Ville de Luxembourg — free transport
The Alzette and Pétrusse valleys give you two genuine green corridors cutting straight through the city below street level — flat, scenic, and largely traffic-free once you're down in the gorge, though getting up out of them again means either steep climbs or hopping the free bus/lift. Bike loaded inside per the Car Camping & Bike Guide — no roof rack, no range penalty on the long autoroute legs. From Camping Kockelscheuer or the Roeser aire, it's a short, mostly flat ride into the valley paths.
| Category | Cost |
|---|---|
| French autoroute tolls (A4/A31, round trip) | ≈ €40–60 |
| Supercharging (2 stops round trip) | ≈ €15–25 |
| Lodging (free Roeser/Glacis aire, or ~€22–31/night Kockelscheuer × 3) | €0–90 |
| Bock Casemates entry (self-guided) | ≈ €9 |
| Public transport in Luxembourg | €0 (free nationwide) |
| Splurge meal — Judd mat Gaardebounen | ≈ €25 |
| Food (self-cooked, rest of trip) | ≈ €25–35 |
| Total | €110–160 |