Kynžvart was once significant castle, located at one of the highest elevations on the territory of the Czech Republic (827 m), used to stand near the famous Kynžvart Chateau of Austrian Chancellor Metternich. Its original name was Königswart (Royal Guard) as it was built as a border stronghold of the kingdom in the 13th century. The castle frequently changed its owners and it even served as a hideaway for thieves in the 14th century. The last owners were the Metternichs who did not repair the castle after it had been plundered by the Swedish army. Instead they used the ruins as building material for the construction of Kynžvart Chateau.
Today, remnants of the castle walls, the castle moat and the foundations of outbuildings are visible. You may enjoy a pleasant outing by walking to the castle ruins up the marked tourist path from Lázně Kynžvart.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.