Natural landmark “Emen Canyon on the Negovanka River” near the village of Yemen, Mihaltsi village, Veliko Tarnovo municipality and Pavlikeni, with characteristic karst formations (caves, rock niches, etc.) with specific vegetation and wildlife in the region of the Middle Predbalkan.
The flora of the Yemeni canyon is quite rich. There are cup-tree hawthorn, hawthorn, junk, kale and common hornbeam, hazel, ash, tern and more. Of the grass vegetation, the most common is the immortelle, followed by the sadina, wild strawberry, coleslaw, viper, yellow and red St. John’s wort, tulip, wild carnation and more. An interesting find is the Samodiv grass.
The animal world is of great interest. There are 14 species of butterflies, of which the small and large crescent, the mother of pearl, etc. are more interesting; in the river – the Unio pictoraum mussel, the river crayfish, the river crooked crayfish (indicators of still clean and unpolluted water), the black net, the sunfish, the mullet, the mole, the doodle and the bitterness. In the rocky places one can see the long-legged frog, the woodpecker, the green and the wall lizard. The poisonous ash, the yellow-water snake, the big-shooter fig.
The greatest diversity is in the bird world. The canyon is inhabited by about 40 species of migratory, permanent and wandering birds – white whitetail, gray heron, red stork (rare in the area), tit, large colorful woodpecker and more. Rock pigeons, eagle-snake, black knight, common mousetrap and kirkenosis have been observed. Griffon Vultures and an eagle have nested above the waterfall in the rocks.
There are 7 species of bats found in the Emenska cave – a Mediterranean horseshoe bat, a small evening primrose and a three-colored nightgown.
Acknowledgment of the uniqueness of the Yemeni canyon is its declaration of a natural landmark. This is related to the restriction of a number of activities such as cutting down plants, felling trees, disturbing animals, construction and more. Strict adherence to these bans will allow a sustainable combination of conservation of natural resources and active tourism. The Yemeni canyon is part of the program of the Bulgarian Association for Rural and Ecological Tourism (BASET) for the creation of eco trails. The steps and bridges, built in the rocks of the gorge, make it easier for those wishing to get acquainted with the beauties of the area.