Can you please check the word choice and let me know which expressions sound better? (The parts in parentheses) Thank you!

3)I couldn’t believe people could eat the meat of animals such as crocodiles or zebras. (I couldn't believe my eyes when I saw people eating the meat of...)
4) The scenery was gorgeous, too. The desert was great though we had an unpleasant experience. I got really frightened when my sister unintentionally (?) touched a snake. Luckily she wasn’t bitten.
5) I liked Cape Town most (the most) because of its skyscrapers and wonderful landscapes.

3. Either phrasing works fine.

4. "unintentionally" is fine; you could also use "accidentally" or "unwittingly."

5. Either "most" or "the most" works fine.