Top 100A cave in the Apuseni Mountains that holds one of the largest underground glaciers in the world: a block of ice over 10,000 years old, reached by stairs down a shaft 60 m across.
An undeveloped cave in the Bihor Mountains near Casa de Piatră: a huge portal, tens of metres high, through which the Gârdișoara stream vanishes underground.
An active cave in the Trascău Mountains, with a portal almost 40 m high in the limestone wall and an underground river of lakes and waterfalls, visited only on guided tours in a wetsuit.
An 18 m waterfall spilling down a limestone wall in the Țara Moților region, near the village of Nemeși in Vidra commune; a landscape reserve 500 m from the road to Avram Iancu.
An 800 m wall of red clay and sandstone on the edge of Sebeș, carved by rain into columns, towers and earth pyramids, a badlands landscape rare in Romania.
A 70–80 m chain of waterfalls, with a 25 m main drop, plunging into a huge sinkhole in the Trascău Mountains and vanishing underground; seen from a wooden balcony a short walk from the road.
A waterfall of about 15 m on the Vârciorog stream, tucked into a spruce forest below Piatra Grăitoare, near Arieșeni; reached up a wooded valley on foot or by horse cart.
An undeveloped cave in the Bihor Mountains, with ice at the entrance and white formations, where a Neanderthal footprint at least 62,000 years old was found in 1974.
Top 100