Both castles are worth seeing, especially considering the fact that they are located not far from each other (34 km), and 109 km far from Minsk.
Mir Castle is a unique monument of Belarusian architecture. It is included into the UNESCO List of World Heritage. It was built in the Gothic style at the end of 15th - early 16th century. The Castle is a square building with the towers at its corners. One of Mir's towers was a go-through and had a drawbridge and iron lattice that could stop a sudden attack easily. The castle represented an unassailable fortification - its walls were protected by two rows of loop-holes and towers were adjusted to shooting from heavy guns.
The Mir's underground system of communication is so large that some of its parts have not been investigated yet. According to one of the legends, a faithful servant of the lord hid the treasures in one of the numerous underpasses of the castle and exploded the entrance. And now people believe that there is a ghost in the castle that guards the treasures and frightens the visitors of Mir Castle.
Nesvizh is one of the oldest and most mysterious cities in Belarus. At the end of the 15th - early 16th century the Radzivilles began the construction of a new castle on the place of the previous one made of wood. The beauty and splendor of decoration of the new residence could have left many royal courts far behind: parquet flooring made of the most valuable sorts of wood, stucco ceiling and gold-plated or painted walls. Nesvizh Castle also has its ghost - the Black Dame strolling along dark corridors of the palace during moonless nights.