Kolumbo is an active submarine volcano located 7 km northeast Santorini island. The highest parts of the crater rim are now about 18 meters below sea level. A caldera is formed in the central part that reaches a depth of 512 meters below sea level. The area of the volcano is the most dangerous underwater volcanic area of the Mediterranean.
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The Museum of Ancient, Byzantine and post-Byzantine Musical Instruments are housed in the old Community building of Oia in Santorini. The interesting collection of Mr Halaris, a famous musician, includes musical instruments that date from 2,800 B.
Karvounolakos beach is set on the south part of the island between Alimia and Merichas. This sandy beach is small and not organized but has marvelous waters alluring you to stay for hours in them! Around the coast you will see the stunning black rocks while its coast is of pretty light hues creating a unique contrast.
Soros beach is a popular long sandy beach organized with sunbeds and umbrellas with sapphire waters and trees offering natural shade to the bathers. It is not suggested for families with children since the water in many spots suddenly deepens and the seabed is abrupt, with some rocks found even near the shore.