Wow, there is such a cool history and culture behind the summer solstice - great to see so many people participating in such a beautiful celebration! One of my favorite memories is from three summers ago when I traveled to Iceland and celebrated the summer solstice at the Midnight Sun Music Festival - I will cherish those moments forever. I'm looking to go again this year, and I found a great article that describes some of the best summer solstice festivals around the world. Here's the link if you want to check it out!
http://www.stridetravel.com/blogs/6-summer-solstice-festivals-around-the-world.html