The ancient theater of Philippopolis was built during the time of the Roman emperor Marcus Ulpius Trajan (98 – 117 AD). and was discovered during archaeological excavations from 1968 to 1979 by the Plovdiv Archaeological Museum. It is located between Jambaz Tepe and Taksim Tepe.

Prohodna Cave is one of the most famous and easily accessible caves in Bulgaria. It lies 2 km away from Karlukovo Village and 112 km away from Sofia. The cave is a natural 262 m long rock bridge. It has two entrances – a big and a small one. A path beginning at the approximately 35 m-high small entrance crosses the cave and goes out through the big entrance - the biggest cave arch in Bulgaria – 45 m.

Tsarevets Fortress is a medieval stronghold located on a hill with the same name in Veliko Tarnovo, the former capital of the Second Bulgarian Empire. The fortress is a significant historical and architectural monument, and it played a crucial role in the medieval history of Bulgaria.

The Rila Monastery is one of the most iconic and significant cultural and historical landmarks in Bulgaria. Situated in the Rila Mountains, about 117 kilometers (73 miles) south of Sofia, the capital city, the monastery is a UNESCO World Heritage Site and a symbol of Bulgarian spirituality and heritage.

The Old Town of Plovdiv, located in the city of Plovdiv, Bulgaria, is a historical and architectural gem that reflects the rich cultural heritage of the region. Plovdiv is one of the oldest continuously inhabited cities in Europe, with a history dating back thousands of years.

The Belogradchik Fortress, also known as Kaleto, is a historical landmark located in the town of Belogradchik, Bulgaria. It is a medieval fortress situated on the slopes of the Balkan Mountains and is known for its unique rock formations and stunning natural scenery.