Cave sights in Trieste
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The Grotta Gigante is near Villa Opicina, 5km northeast of Trieste. At 107m high, 280m long and 65m wide, the ‘giant grotto’ is one of the continent’s largest accessible caves – St Peter’s Basilica in Rome could fit inside. Nearly 500 steps lead you down into its eerily lit vault replete with stunning stalagmites. Take bus 42 from Piazza Oberdan, or tram 2 – the scenic choice that has covered the 5.2km journey since 1902 – to Villa Opicina, then bus 42 to the cave.