Hot air balloon flies underground
A man from Austria does something exciting. He is in Croatia. There is a deep cave there. He flies into the cave with a hot air balloon. This is the first hot air balloon flight underground. The flight takes around 25 minutes.
Difficult words: exciting (something that makes you feel good or is really interesting), cave (space in the ground), flight (the action of flying).
You can read the original story and watch the video in the Level 3 section.
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