Sea it to believe it: During the day, Mermay offers underwater fun for all ages, from street performers and food trucks to beach-themed crafts and photo booths. But as evening falls, the two-part, mini festival gives way to Lore…home to selkies, sirens, and all that lurks in the deep sea. Float to music from Bro-X’s retro electronica and let Ships in the Night’s “ethereal ambient lullabies” wash over you like a wave.