Reach new heights in your relationship—literally. Rock climbing is a great activity for two. If you or your date is a beginner, hit an indoor course and race each other to the top. If you’re a couple of thrill seekers take a course in outdoor climbing. Experts say that it’s such a popular activity for couples because it relies heavily on communication and trust, two important aspects in relationships. And as an added bonus it’s a great full-body work out. Professional instruction is strongly recommended, let’s hope neither of you are afraid of heights.