Italy

Grotte di Castelcivita (Castelcivita Caves)

Italy

5000 m long

Grotta di Nereo Nereo Cave

Italy

4000 m long · 33 m deep

Grotta di Nettuno Neptune's Grotto

Italy

4000 m long

Grotte di Castellana (Castellana Caves)

Italy

3000 m long

Grotte di Pertosa (Pertosa Caves)

Italy

3000 m long

Grotte di Toirano (Toirano Caves)

Italy

2000 m long

Grotte di Pastena (Pastena Caves)

Italy

900 m long

Grotta Regina del Carso (Queen of Karst cave)

Italy

320 m long · 57.4 m deep

Grotta Gigante (Giant Cave)

Italy

280 m long · 115 m deep

Grotta dell'Artiglieria (Artillery Cave)

Italy

95.9 m long · 42.5 m deep

Orecchio di DionisioEar of Dionysius

Italy

65 m long · 70 m deep

Grotta Azzurra

Italy

54 m long

Grotta dello Smeraldo

Italy

45 m long · 32 m deep

Addaura grottoes

Italy

Grotta del Cavallo

Italy

Grotta del Cavallone (Cavallone Cave)

Italy

Grotta delle Felci

Italy

Grotta di Ispinigoli (Ispinigoli Cave)

Italy

35 m deep

Grotte di Borgio Verezzi (Borgio Verezzi Caves)

Italy

Grotte di Frasassi (Frasassi Caves)

Italy

400 m deep

Sibyl's Cave

Italy

The Scurati Caves

Italy

Abisso Bonetti (Bonetti Abyss)

Italy

87.5 m long · 49 m deep

Grotta Paglicci (Paglicci Cave)

Italy