The Red Wall is one of the four biospheric reserves in the Rhodopes under the aegis of UNESCO, declared a unique world heritage. The most beautiful part of the biospheric reserve is the Sushitsa valley. It is the most difficult of access valley in the Rhodopi Mountains, with extremely steep rocky slopes that reach 800 meters of displacement. The high-water river, that cuts across the middle of the reserve, has formed many beautiful and secret canyons. The water is rich in trout, and with a preserved otter population.
This is one of the richest in caves regions in Bulgaria. The Ahmetiova Dupka Cave is a real pearl. It is provided with all utilities except light. However, this is not an obstacle if you want to see its beauties, gathered in an only hall with a length of 40 metres. At the very entrance you are welcomed by a gigantic, 5-meter-tall stalactone, and from here on no words can describe the countless formations.
The Ivanova Voda (Ivan’s Water) and Druzba (Friendship) Caves are a true challenge for the speleologists. They are abyss caves, with depths respectively 131m and 211m.
A few hundred meters below the Martsiganitsa Hut is the Topchika Cave. There are no cave formations in it, but some primitive rock drawings were found here. Flint tools were also found here during some archaeological work, as well as a whole skeleton of a cave bear. The upper hall is connected to a lower hall through a 50m. abyss.
Iamata (The Pit) and Hralupata (The Hollow) are among the other interesting caves. They are situated to the north of Topchika, and there you can see some rare cave formations, like helictites.
There are bears, wolves and deer in the Sushitsa region, but the greatest sight is the wild goats. This is a real paradise for day-time and night-time birds of prey, most interesting among which are the imperial eagles.
There are several Thracian sanctuaries, two of which very famous for their miraculous effect on the number of admirers. These are called Belantash and Karadzov Kamak. They face each other with their beautiful, inaccessible rock formations, on top of which there are numerous hewn channels, steps and gullies. Ancient coins, silver ornaments and ceramics have been found in the graves around them.
The Popa Peak impresses with its incomparable view to the whole Sushitsa Valley and a great part of the Rhodopes. A number of ceramic finds have been discovered here, proving that the peak was a sanctuary thousands of years before the new era.