The famous Cave of Antiparos is located on the southeast 9km far from the village, on the hill of Ai Yiannis at a height of 175m. In the entrance of the cave there is a beautiful little church of Agios Ioannis built in the 18th century. The cave spreads over an area of 5600 square metres and reaches a depth of over 100 metres with impressive stalactites and stalagmites. The arched entrance to the cave is 20 metres wide and approximately 8 metres high. A huge stalagmite at the mouth of the cave is the oldest in Europe and dates back 45 million years. Sadly, during the Russian occupation of 1770-74, Russian officers cut off many stalactites that can be seen today at the Hermitage Museum in St. Petersburg. The cave was also damaged by Italians and Germans during the Second World War.
The Venetian castle was built around 1440 to protect the inhabitants from pirate attacks. Today only the base of the central tower, the outside walls of the ground floor and parts of the roof can be seen.