📜 Historic Art Nouveau building housing Hungary's oldest scientific research institute, established in 1869. 🔍 Features a geological museum with extensive collections, housing over 180,000 fossils, minerals, and rocks. # Why Go 🏛️ Admire unique Hungarian Art Nouveau architecture by Ödön Lechner 🎨 See brightly colored Zsolnay tiled roof representing the ancient Tethys Ocean ✨ Discover fossil details, folk art elements, and geological themes throughout 🔬 Explore the country's largest geological collection 💎 Explore 23 thematic geological collections 🆓 Free entry on Earth's Day and European Heritage Day # Why Avoid ⚠️ Individual weekday visits require advance arrangement or may not be possible # Cost 💰 Adults 500 HUF, Students/Pensioners 250 HUF, Student Groups (min. 10) 150 HUF, Budapest Card 250 HUF. Free on Earth's Day (April 22) and European Heritage Day (September weekend). # Hours 🕒 Thursdays, Saturdays & Sundays 10 am to 4 pm. Other times for groups by appointment. # Getting There 🚌 Accessible by bus 7, 73, 67V, trolley 75, 77, or metro 2. # Tips ⏰ Allow 60-90 minutes for a visit.