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AEREA take over Kastel in Beyoğlu, Istanbul on the night of Friday 18 December 2026. The Madrid- and Berlin-based duo was formed in 2021 by producer Al' (Alejandro Fernández) and vocalist Caar (Carlota Hernández); their self-described “emotional techno” fuses melodic techno and trance melodies with hardgroove percussion, heavy bass and live vocals in Spanish and English. Releases such as “10.000 Flores”, “Ruido” with Regal, 2025's “Amor Dulce” and “In a Spiral” on their own label Terra have made them one of the standout acts on Europe's club circuit over the past two years; they have played Fabrik Madrid, E1 London and Gotec Karlsruhe with BCCO, as well as festivals including Dreambeach, Medusa and Aquasella. The night runs from 22:00 to 05:00, and the Nonstop Techno line-up also features Berred, Doe, Aliz and Zandesh. Tickets start at TRY 1,250 and the event is 18+. Kastel sits on Kamer Hatun Caddesi in Hüseyinağa; ID checks are carried out at the door and tickets are generally non-refundable and non-transferable.