One of the most significant monuments in the capital of Andros, is its famous castle, which was built by Marinos Dandalos, after he conquered the island. The castle's towers and barracks, as well as the blazons of the Venetian rulers, were well preserved until 1943. After the heavy bombardment of that year, the castle was completely destroyed. Today, one can only see its ruins. From "Messa Castro", which included the chambers of the Venetian ruler, one can see only parts of the tower's wall, while from "Kato Castro" there are still parts of the walls and the buildings.
The spring of mineral water of Sariza is situated in the village of Apikia, 4 km west of Hora. The spring is situated above the village's central square, and it attracts many visitors who come to drink its water. In the same village - occasionally called "Sariza", because of the spring - is the bottle factory of the famous water which is recommended for cases of urinary gravel and psammiasis. After being poured to bottles, the water is sold throughout Greece under the name of "Sariza" or "Lezina".
The Naval Museum of Andros is one of the most impressive buildings in Hora. It includes a wide collection of naval implements, models of ships and photographs. The Museum attracts a multitude of visitors, in the summer.