Italy Sinkhole cave
Foiba of Basovizza
228 m below the entrance.
Dans · CC BY-SA 4.0
The descent
228 metres down, to scale.
The real relief above Foiba of Basovizza, measured on the Copernicus model every 30 m, and the cave going down at the same vertical scale.
Great Pyramid (139 m) would fit upside down 1.6 times.
The depth is the one published by those who explored it; the shape of the galleries is a sketch, not a survey.
228m
Depth
published (Wikidata)
388m
Entrance altitude
from the 30 m relief model
12°C
Inside, all year
the yearly average outside, at the entrance
92m
Rock above
the highest point within 1.5 km
Inside and outside
12 °C inside, all year.
Deep inside, a cave keeps the average temperature of the year outside: about 12 °C here, in January and in August. In July the afternoon reaches 26 °C at the entrance, 14 °C warmer than inside: take a jacket. The wettest months are in September and in November: water rises fast underground, so never go in without a guide after heavy rain.
- 5°0°Jan
- 6°0°Feb
- 10°3°Mar
- 15°7°Apr
- 19°12°May
- 23°16°Jun
- 26°19°Jul
- 26°18°Aug
- 21°14°Sep
- 16°10°Oct
- 11°6°Nov
- 7°2°Dec
Outside: afternoon and night averages for 1991–2020 (NASA POWER) brought to the altitude of the entrance. Inside: the yearly average, which deep parts of a cave keep. Near the entrance it follows the weather a little.
Foiba of Basovizza is a sinkhole cave in Italy. It goes down 228 m below the entrance. The entrance is at 388 m. It has an underground river.
Getting there.
- Wild cave: only with caving equipmentNo paths or lights inside. Go only with a caving club or a qualified guide.
- Dolinanearest town · 3.7 km in a straight line
- Viewpointsnearest viewpoint · 1.0 km from the entrance
- Trieste Airport (TRS)nearest airport with scheduled flights · 38 km in a straight lineCar hire at TRS airport (Ronchi dei Legionari/Trieste)Discover Cars · sponsored link↗
Plan the visit
Guided tours, a bed nearby, a car.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
From above.
The ground above the cave, with the relief shaded, the line of the section and what people have mapped around the entrance.
N
1.5 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 6.0 × 6.0 km, north up. The line is the section above. Points © OpenStreetMap contributors.
Around the entrance.
- 168other cave entrances within 3 kmfoiba F2 3-09, Grotta Nera / Pečina nad Borštom, Grotta Impossibile and 165 more
- 4springs within 2 kmSorgente del Rio Gias, Fonte Oppia and 2 more
- 3sinkholes within 3 km
- 15viewpoints within 3 kmVedetta di San Lorenzo, Vedetta di Moccò, Val Rosandra / Glinščica and 12 more
- 41marked hiking routes within 3 kmAlta via del Carso, Sentiero di forma circolare de Val Rosandra, Sentiero Ressel and 38 more
- 3climbing crags within 3 kmSokoli (Falchi, Falchetti), Piccola Ferrovia 1 e 2 (palestra di roccia), Dodici Vie
- 1named waterfalls within 4 kmSupet
- 54car parks within 2 km
- 67information boards and visitor centres within 3 km
- 32bus stops within 2 km
- 17campsites within 8 kmArea camper "Le Piane", Mamaca Park, Campeggio Obelisco and 14 more
- 105hotels and guesthouses within 8 kmAffittacamere Berzi, Locanda Mario, Albergo Città di Parenzo and 102 more
- 30restaurants and cafés within 3 km
- caving clubs and spots within 15 km
Counted in OpenStreetMap, the map anyone can edit, around the entrance. A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
Towns nearby
- Dolina3.7 km in a straight line
- Domio3.7 km in a straight line
- Hrpelje6.8 km in a straight line
- Trieste7.0 km in a straight line
- Muggia8.2 km in a straight line
- Opicina8.4 km in a straight line
- Sežana8.4 km in a straight line
- Spodnje Škofije8.9 km in a straight line
In our other atlases
What else is around Foiba of Basovizza.
The river at the entrance, the waterfalls, the lakes, the mountains and volcanoes above, the canyons, beaches and islands nearby — from our other atlases.
Peakyas29 mountains within 10 kmFigures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, NOAA, OpenStreetMap). Links open when each site is online.
Month by month
The weather outside, at the entrance.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon | 5 | 6 | 10 | 15 | 19 | 23 | 26 | 26 | 21 | 16 | 11 | 7 |
| Afternoon | 5 | 6 | 10 | 15 | 19 | 23 | 26 | 26 | 21 | 16 | 11 | 7 |
| Night | 0 | 0 | 3 | 7 | 12 | 16 | 19 | 18 | 14 | 10 | 6 | 2 |
| Rain (mm) | 68 | 82 | 72 | 69 | 89 | 74 | 60 | 79 | 112 | 102 | 123 | 96 |
| Rainy days | 8 | 8 | 9 | 11 | 12 | 12 | 11 | 11 | 11 | 12 | 12 | 10 |
| Sun hours/day | 2.6 | 4.1 | 5.7 | 7.2 | 8.5 | 9.9 | 10.6 | 9.4 | 7.0 | 4.6 | 2.6 | 2.5 |
| Snow on the ground (cm) | 10 | 9 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 7 |
| Afternoon | Afternoon | Night | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | 5 | 5 | 0 | 68 | 2.6 |
| Feb | 6 | 6 | 0 | 82 | 4.1 |
| Mar | 10 | 10 | 3 | 72 | 5.7 |
| Apr | 15 | 15 | 7 | 69 | 7.2 |
| May | 19 | 19 | 12 | 89 | 8.5 |
| Jun | 23 | 23 | 16 | 74 | 9.9 |
| Jul | 26 | 26 | 19 | 60 | 10.6 |
| Aug | 26 | 26 | 18 | 79 | 9.4 |
| Sep | 21 | 21 | 14 | 112 | 7.0 |
| Oct | 16 | 16 | 10 | 102 | 4.6 |
| Nov | 11 | 11 | 6 | 123 | 2.6 |
| Dec | 7 | 7 | 2 | 96 | 2.5 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the altitude of the entrance (388 m) with the standard lapse rate. Not a forecast.
Photographs
Inside and around.
Recent years
Wet years, dry years.
Rain of each month as a share of the 1991–2020 average. A dry year means a lower river and hotter rock; a wet one, more water in the gorge.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 27% | 38% | 116% | 35% | 69% | 196% | 87% | 169% | 121% | 210% | 33% | 244% |
| 2021 | 200% | 92% | 49% | 157% | 167% | 33% | 170% | 84% | 60% | 58% | 107% | 114% |
| 2022 | 50% | 53% | 65% | 82% | 77% | 69% | 80% | 79% | 240% | 31% | 109% | 188% |
| 2023 | 189% | 33% | 87% | 139% | 139% | 144% | 217% | 261% | 58% | 206% | 154% | 144% |
| 2024 | 179% | 124% | 196% | 116% | 213% | 111% | 98% | 69% | 162% | 194% | 48% | 73% |
| 2025 | 167% | 84% | 202% | 135% | 129% | 36% | 204% | 134% | 131% | 179% | 95% | 29% |
130% or more: wet month 70% or less: dry month
Caves nearby.
Foiba of Basovizza
Italy
- 228 mDepth
- —Galleries
- 388 mEntrance altitude
- 12 °CInside, all year
Škocjan Caves
Slovenia · 11 km
- —Depth
- 6.2 kmGalleries
- 378 mEntrance altitude
- 12 °CInside, all year
Postojna Cave
Slovenia · 31 km
- —Depth
- —Galleries
- 544 mEntrance altitude
- 10 °CInside, all year
Vilenica Cave
Slovenia · 6 km
- —Depth
- —Galleries
- 419 mEntrance altitude
- 12 °CInside, all year
Where these figures come from
| Name, type, published depth and length, visitors | Wikidata (Q1611344) · CC0 |
|---|---|
| The relief above, the entrance altitude, the section and the 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 |
| Entrances, springs, sinkholes, opening hours and what is around | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Rivers, waterfalls, lakes, mountains, canyons, beaches and islands nearby | Coastya, Lakeyas, Peakyas, Cascadyas, Islandyas, Riveryas |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers, canyons, caves, dark skies, viewpoints, birdwatching or forests?
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