A closer look

Tourism used to mean climbing up into the sky, but now it’s diving into the deep. Passenger submarines are offering everyday people the chance to slip below waves, descending into underwater worlds once reserved for scientists and explorers. Inside, it’s eerie and majestic—the silence broken only by the hum of machinery as coral gardens glide by outside. Schools of fish drift past the window like living murals. It feels like stepping into a spaceship, but in reverse: soaring not outward into stars, but inward into Earth’s hidden oceans.