Hisarya walled Roman town
The best preserved Roman city walls in Bulgaria, some 2.3 km long. Hisarya was founded in prehistoric times and flourished in Roman times as a resort thanks to mineral springs. Site contains ruins of many public buildings including a small amphitheater and some ancient churches.
Wonders of Bulgaria
Wondermondo 🢖 World 🢖 Wonders of Europe 🢖 Wonders of Bulgaria Territory Wonders of Bulgaria   Highlights Quite a few of the many wonders of Bulgaria are without analogs in the world. The most interesting places here are: Thracian heritage. Although Bulgaria has interesting prehistoric, Roman and Byzantian heritage, some of the most interesting archaeological landmarks are remnants of the unusual Thracian […]
Prohodna
Giant cave – 262 m long passage through the mountain that is world-famous thanks to two openings in the ceiling – so-called "Eyes of God" or "Oknata". The largest entrance in the cave has a height of 42 – 45 metres.