Final answer:
The sentence "Traveling to dazzling destinations is the best experience" contains an irregular superlative adjective, 'best', which is the superlative form of 'good'.
Step-by-step explanation:
The sentence with an irregular superlative adjective is "Traveling to dazzling destinations is the best experience." The word 'best' is the superlative form of 'good,' which does not follow the regular pattern of adding '-est' to the base adjective. Regular superlative adjectives typically involve adding '-est' to the end of the word or preceding it with 'most' for words of more than one syllable. In contrast, irregular superlatives change the base form of the adjective, as is the case with 'good' becoming 'best.'
Irregular superlative adjectives are those that do not follow the standard rules for forming the superlative degree. In English, these adjectives change completely from their base form rather than simply adding a suffix or prefix.