Water level oscillations in coastal caves: relationships with sea level variations and POS development (Coves del Drac, Mallorca, Western Mediterranean)

• Understanding cave tides improves knowledge of coastal cave environments. • Water level changes in cave pools are influenced by external coastal tides. • Current POS growth aligns with modern sea level oscillations. • POS mark ancient sea levels and tide range in coastal caves. • POS serve as reliable proxies for both past and present sea levels.