Describe a unique trip

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Across
  1. 2. beautiful in a dramatic and eye-catching way (first letter, S)
  2. 5. difficult to forget
  3. 6. impressive, amazing
  4. 7. very old
Down
  1. 1. extremely interesting (first letter, F)
  2. 3. remarkable enough to be famous; very well known
  3. 4. one of a kind