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Two weeks ago we played at one of the biggest and definitely one of the best psytrance parties in the Czech Republic.
This party has a long tradition(visic http://bio.mimo.cz for the details) and developed from one small event to the weekend full of psychedelic music (definitely not only psytrance), masks, circus, arts, bizzare creatures, steampunk installations and just almost everything you can imagine. Yet it still has its specific family like feeling, ...some magic surely hapens at that place!
We stayed there only for part of the nigh after our performance, but it was a great time there, if you want to go for some great psytrance party, do not every miss Czech BIO ;-)