Fascinating hidden gem in London ⤵️ Hidden under Bloomberg HQ in the City of London, this 2,000-year-old Roman temple was once home to secret rituals of the cult of Mithras London Mithraeum is totally free to visit (just pre-book online) and it’s one of the most immersive historical experiences in the city—complete with sound, light, and real Roman artifacts 🏺 📍London Mithraeum, Walbrook EC4N 🎟️ Free entry – but book ahead! 📌 Save this to your London list #hiddengemslondon #thingstodoinlondon #londontips #londonguide #londontravel #londonexplorer #londonblogger #uktraveller #uktravelblogger #romaniantraveler #romaniantravelblogger Hidden Gems London | Free Things To Do London | Roman History London | London Secrets | Ancient Roman sites UK | Bloomberg Space London | Things to do in City of London | Underground temple London | Unique museums in London | Free London attractions | Historical places in London | Archaeological sites London | Roman temples in London | London travel guide | Offbeat London experiences