Tour Isabelle, Natural arch in Plateau-des-Petites-Roches, France
The limestone formation rises to an elevation of 1790 meters within the eastern section of the Aulp du Seuil cirque in Chartreuse mountains.
The location of this natural arch remained undocumented in official guides until 2006, when Pascal Sombardier published detailed information in his mountain guidebook.
The natural arch takes its name from Isabelle de France, connecting the geological landmark to French historical figures and regional nomenclature traditions.
Hikers can reach the arch through a marked trail starting at Col de Marcieu in Saint-Bernard, following the Grand Sangle de l'Aulp du Seuil loop.
The formation features a double arch structure with its lower opening spanning 30 meters, making it the largest natural arch in the Alps.
Location: Plateau-des-Petites-Roches
Elevation above the sea: 1,790 m
GPS coordinates: 45.36910,5.90426
Latest update: June 23, 2025 09:47
Cirque de Saint-Même
2.7 km
Château du Touvet
3.4 km
Réserve naturelle nationale des Hauts de Chartreuse
2.5 km
Lances de Malissard
3.5 km
Réseau de l'Alpe
6.2 km
Le Planolet
5.3 km
Canal de la Chantourne
5.3 km
La Scia
4.7 km
Torrent de Bresson
1.6 km
Ruisseau de la Terrasse
1.6 km
Tournerie de Saint-Même
4.6 km
Grande Cascade
2.7 km
Vallée des Entremonts
5.8 km
Chapelle des Dix-Mille Martyrs
6.6 km
Bench
3 km
Église Saint-Vincent de Saint-Vincent-de-Mercuze
3.6 km
Église Saint-Pierre de Saint-Pierre-d'Entremont
6.4 km
Église de Sainte-Marie-du-Mont
5.1 km
Église Saint-Bernard de Saint-Bernard
4.6 km
Saint Thérèse of Lisieux Church
6.6 km
Église Saint-Philibert de La Flachère
5.5 km
Église Saint-Alexis de Saint-Pierre-d'Entremont
6.6 km
Église Saint-Didier du Touvet
4 km
Église Saint-Aupre de La Terrasse
5.4 km
Beaumont castle
3.1 km
Chapelle du cimetière de La Terrasse
5.6 km
Château du Carré
5.7 km
Chapelle du Carré
5.9 kmReviews
Visited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes