The Niborio of Evia was known for decades as the refuge of the fishermen of Nea Styra, and its sheltered bay served as a safe harbor even since ancient times. The Dragon Houses in the area were famous and well-known since ancient times. The neighboring town of Styra was also renowned since antiquity for its participation in the Athenian League and its contribution to significant military events such as the Battle of Salamis and the Sicilian Expedition. Moreover, in the wider region, the Avantes lived, warriors who fought in the Trojan War and were known for their courage and bravery.

The Dragon Houses are 23 peculiar structures that have been standing here for thousands of years. This name derives from a local legend that claims they were the dwellings of mythical dragons. However, it is likely that they were built to oversee the surrounding area. Situated on steep mountain slopes, they stand out for their unique architecture. Constructed with large stones, they are carved into rectangular shapes, harmoniously blending into their environment.

Mystery surrounds their architecture, as they lack foundations, and the gigantic slabs are not connected to each other with any material. They have been positioned in a way that one slab is placed on top of another, while large boulders have been used as counterweights. Their roofs are pyramid-shaped and have been constructed with absolute precision, following a specific system.

To this day, archaeologists have not discovered the method by which the giant stones were transported and placed. Additionally, the exact construction date and builders remain unknown. However, it is certain that the builders possessed knowledge of statics and cyclopean masonry.

A popular theory suggests that enslaved craftsmen from Kares worked in the quarries of Nimporeios and contributed to the construction of these impressive structures.