Terraced levels, caves, routes and steps shape the townscape of Trôo. The village also features cave houses carved into tufa, historic monuments and two named routes that pass through it. When planning your stay, it is worth considering these different aspects separately: the architectural forms and monuments tell the story of the town, while the route information helps you choose a section to follow.
Tufa, Caves and Townscape
The cave houses of Trôo are carved into tufa and are considered a distinctive part of the town’s architectural heritage. One specific example is the Cave Yuccas: this fully restored former troglodytic dwelling comprises six rooms carved into the tufa and offers a view over the Loir Valley. Access arrangements may vary seasonally; check them before your visit.
The Grotte pétrifiante also shows how closely the townscape is connected to the rock. Minerals are deposited there at a rate of about one centimetre per century, forming a delicate stone mineral structure. The stated rate is an indication of a very slow process; it describes neither a short-term effect nor a change that could be observed during a stay.
Terraces, caves and steps give the town’s layout its distinctive form. Together with the living spaces carved into tufa, they offer several points of interest if you are interested in architecture and the character of a place. The Cave Yuccas illustrates a former residential use, while the Grotte pétrifiante draws attention to mineral formation. These are different ways of exploring the local heritage, not two descriptions of the same phenomenon.
Church, Fortifications and Monuments
The collegiate church of Saint-Martin was founded by Geoffroy Martel in 1050 and is listed as a Monument historique. Other heritage listings refer to different sites and protection statuses: the ruins of the Maladrerie Sainte-Catherine have been classified as a Monument historique since 1889; the Le Puits qui parle well has been listed in this category since 1935. The former priory of Notre-Dame-des-Marchais is classified as a Monument historique under the 1862 list. These dates refer to different historical or heritage-related details and should not be treated as construction dates.
Trôo’s fortified defensive system includes two motte-and-bailey mounds and two rings of fortifications. Gates are also part of the description; they are associated with chapels or a motte. Thus, the focus is not only on individual buildings but also on larger structures: the church is described in terms of its foundation and heritage status, while the fortifications are described as a system made up of several elements.
Routes Through Trôo
Two route descriptions place Trôo on different sections of longer routes. The GR 35, known as “Du Perche au Loir,” passes through the town on the section between Pezou, north of Vendôme, and Vaas. The signposted “Vallée du Loir à vélo – V47” route also passes through Trôo on the Montoire-sur-le-Loir–Ruillé-sur-Loir stage. The places named distinguish the two sections and provide a concrete basis for comparing routes. Check the conditions for the GR 35 before setting off. The V47 route may be subject to changes by the route’s managing authority; check the course of your stage in advance.
Discover more destinations: Nouan-Le-Fuzelier, Souvigny-En-Sologne, Muides-Sur-Loire, La Ville-Aux-Clercs, Cellettes, Ouchamps, Villeny, Mesland.
Go to the main travel overview: Loir-Et-Cher.
