Walk on the beach
Take a ride to a secluded(隐蔽的) beach at sunset and park your car nearby. Slip your hand into your partner's and take a stroll along the beach bare foot, watching the sunset together. It will be better to stay awhile after the sunset and enjoy the sight and sound of the waves crashing into the shore, as the water covers your feet. Look up at the starry sky and feel the magic of the universe. (来源：专业英语学习网站 http://www.EnglishCN.com)

Have a beach-dinner
If you can arrange it, treat your love to a candlelit(烛光的) dinner under the stars, preferably

Source:theholidayspot