📜 Ancient sewer chamber in Cologne, Germany, modernized in 1890. 🔍 Originally equipped with chandeliers for Kaiser Wilhelm II, it now features an elegant chandelier and hosts concerts and public tours. # Why Go 🎶 Enjoy regular concert series in a unique subterranean setting with unique acoustics 🚶 Explore an ancient Roman-era sewer system and take free guided tours 🏛️ Experience historical significance beneath the city, exploring a site with Roman-era origins 📸 Opportunity for unique photos 💡 Experience a fascinating subterranean attraction # Why Avoid 👃 Be prepared for potential odors 🔒 Entrance is locked and requires accompaniment for access # Tips 🗓️ Tours available monthly from early spring through fall; check the website for current tour dates and concert schedules 📍 Find the entrance on the south-east corner of Theodor-Heuss Ring Road near the sidewalk, near the Rhine # Cost 💰 Guided tours are free. # Hours 🕒 Monthly tours available from early spring through fall; regular concert series since 2000.