The Fundoklia educational trail in Érd, Hungary
The Fundoklia Valley can be found in the western part of the Érd-Tétényi Upland in Hungary. It is approximately 3 kilometres long, 10-30 meters deep, dry karst valley formed by Sarmata limestone. The M7 motorway divides it. The whole valley is a nature conservation area, protected by the local government; the northern part is also under archaeological protection; the southern part is enlisted as a NATURA 2000 site

The valley has a unique landscape value, and it is rich in archaeological, botanical, and zoological values. The area is rich in natural resources: 316 vascular plants were described here. It has two highly protected species: the Seseli leucospermum, and the Dianthus serotinus subsp. Regis-stephani, and another 33 protected species; the Stipa pulcherrima and the Stipa eriocaulis have a huge stock here, the Adonis vernalis (pheasant's eye), is also frequent, while the Lilium martagon (Martagon or Turk's cap lily) is a valuable rarity.
The Fundoklia educational trail leads the visitors along the eastern part of the valley, on previously spontaneously evolved paths; on the edges, and at the bottom of the valley. The visitors can enter by foot or by car from the neighbouring streets, without damaging the natural values. Vehicles can park around the protected area without disturbing the traffic. The trail consists of two parts: the first is around 1060 meters long and presents the flora and fauna of the dry meadows of the plateau and the edge of the hill, while the second one is around 600 meters long and presents the forest wildlife of the bottom of the valley. Important elements of the trail are the information boards (2 pieces), and wood-panel stations (12 pc), and where the steep, slippery trail, covered with friable Sarmata limestone is too dangerous, there are wooden stairs with railings. The location of the 12 stations is defined by the geological, geo-morphological, archaeological, zoological, and botanic values, and by the location of the former mines.
The topics of the 12 stations are the following:
1 Mining, the areas of artificial basement systems, the Sarmata limestone as building material;
2 The presentation of the world-famous prehistoric sites of Érd;
3 The wooded steppe meadow with Brachypodium sylvaticum;
4 The Stipa rocky meadow (Stipo eriocauli – Festucetum pallentis); 5 The Sarmata limestone steppe meadows;
6 The presentation of the geological characteristics of the valley at the mining area;
7 The wildlife of the forest of the valley and the dry bushes;
8 The grassy cliff hilly steppe meadow;
9 The open rock grasslands (Bromo – Festucion pallentis; with Fumana procumbens);
10 The presentation of the diverse geomorphology of the valley;
11 At the end of the valley loess grasslands and the loess bush of Amygdalus nana L.;
12 At the end of the valley the colonies of the European Bee-eater, Merops apiaster, and the wildlife of the surrounding shrubs, hedges, and abandoned orchards can be seen.
Thanks to the protection of the stone row the area can be visited only on foot, thus the disturbance was reduced and the protection became more effective. After the installation of the information boards and trail-station tables, the visits to the area increased.