The full-day Sound Open Air festival will take place on May 18 at the National Monument of Vítkov overlooking Prague. The first announced foreign headliners are Roumex and Dean Demanuele.

The full-day Sound Open Air festival will take place on May 18 at the National Monument of Vítkov overlooking Prague. The first announced foreign headliners are Roumex and Dean Demanuele.
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