🇸🇮 Slovenia
Postojna travel guide
Postojna Cave is one of the world's largest karst cave systems and Europe's most visited cave. An underground train whisks visitors through 24km of passages filled with stunning stalactites, stalagmites, and the famous "baby dragon" - the olm salamander. Combined with nearby Predjama Castle built into a cliff, it's Slovenia's dramatic underground adventure.
Language
Slovene (English at attractions)
Currency
Euro (EUR)
Timezone
CET (UTC+1), CEST in summer (UTC+2)
Best time
Year-round (cave is constant 10°C)
Budget/day
€70-150/day
When to visit
Jan
Cave 10°C, outside -2°C - 5°C
Feb
Cave 10°C, outside -1°C - 7°C
Mar
Cave 10°C, outside 2°C - 12°C
Apr
Cave 10°C, outside 6°C - 17°C
May
Cave 10°C, outside 11°C - 22°C
Jun
Cave 10°C, outside 15°C - 26°C
Jul
Cave 10°C, outside 17°C - 28°C
Aug
Cave 10°C, outside 17°C - 28°C
Sep
Cave 10°C, outside 13°C - 23°C
Oct
Cave 10°C, outside 8°C - 17°C
Nov
Cave 10°C, outside 3°C - 10°C
Dec
Cave 10°C, outside 0°C - 5°C
Safety
very safePostojna town is very safe. Inside Postojna Cave, follow guide instructions strictly — cave temperatures are 8–10°C year-round so bring a warm layer. Slippery cave paths exist — wear proper shoes.
Women travellers
Extremely safe.
Culture & etiquette
- + Join English-language cave tour
- + Visit Predjama Castle (combined ticket)
- + See the olm (baby dragon)
- + Bring warm layer for cave
- - Don't touch formations
- - Don't use flash photography
- - Don't leave the path
- - Don't underestimate cave cold
Food to try
Jota
Traditional bean, sauerkraut, potato stew
Kraški pršut
Karst-region cured ham
Teran wine
Red wine from karst region
Hidden gems
Details are indicative and may change. Verify visa, safety, and entry requirements before travel.