1.
cave, cavern, grotto
A natural underground hollow space in rock, large enough for a person to enter.
洞窟 refers to caves or caverns. 洞 means 'cavity/cave' and 窟 means 'cave/den.'
TYPES OF CAVES:
- 鍾乳洞: limestone cave (with stalactites)
- 海食洞: sea cave
- 溶岩洞: lava tube
COMMON EXPRESSIONS:
- 洞窟を探検する: to explore a cave
- 洞窟探検: cave exploration, spelunking
- 洞窟の奥: deep inside a cave
- 洞窟壁画: cave paintings
FEATURES:
- 鍾乳石: stalactite
- 石筍: stalagmite
FAMOUS JAPANESE CAVES:
- 秋芳洞: Akiyoshido (Yamaguchi)
- 龍泉洞: Ryusendo (Iwate)