Dobrá Voda Castle is a ruin of a Gothic castle situated in the central part of the Little Carpathians above the village of Dobrá Voda in the Trnava District.

The castle was built on the site of an older fort in the 13th century, in a mountainous terrain on a rocky outcrop, on one of the roads passing through the ridge of the Little Carpathians. Its location predetermined it to be a guarding castle. The name of the castle is derived from the numerous water springs in its vicinity (Dobrá voda means Good water).

At times of the rebellion of Francis II. Rákóczi (in 1703) the castle was very damaged and subsequently repaired. In the 18th century, however, the castle was struck by fire and could not be restored anymore. Like many other ruins in the Little Carpathians, it slowly disintegrates. Today, it is still possible to see the most striking architectural features of this building - a larger, square tower, and a smaller tower. In addition, remnants of various farm buildings are visible too.

The extensive ruins of Dobrá Voda can be reached from the village of Dobrá Voda. The starting point can be a municipal church, where you can park, or drive a narrow asphalt road up until you reach a large cemetery where there is a smaller car park too. The route continues through the cemetery along the red marked trail and the ascend lasts approximately 20 minutes.