The oldest known structure is probably at Theopetra cave in Greece, about half-way between Larissa and Ioannina. It has the remains of a wall which narrows the mouth of the cave. It is believed to have been built to limit winds blowing into the cave late in the last Ice Age, about 23,000 years ago.

This type of rock formation and weathering process has happened in many other places locally and throughout the world, but what makes Meteora's appearance special is the uniformity of the sedimentary rock constituents deposited over millions of years leaving few signs of vertical layering, and the localised abrupt ...

The Holy Monastery of Great Meteoron, located at Meteora-Greece, is the biggest and oldest one of all. It is called the monastery which remains “suspended in the air” (meteoro), because of the cliff formation of a gigantic rock on top of which it was built.

Theopetra Cave is a famous archaeological site. It is the first excavated cave in Thessalia, but its importance is the fact, that its deposits start at the Middle Paleolithic (50,000 BC) and last until the end of the Neolithic period (4,000 BC) without gaps.