Top 100Romania's largest natural bridge and the only one in the world carrying a public road: a 30 m limestone arch left standing after a cave roof collapsed, in the village of Ponoarele on the Mehedinți Plateau.
Top 100A karst complex on the Padiș Plateau: three huge sinkholes with walls over 200 m high and a portal over 70 m tall where the Cetăților stream vanishes into the mountain. Seen from a marked hiking loop, not a show cave.
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 ice cave in the forests of the Galbena Valley near Padiș, reached on foot along a marked trail. Around midday, light pours in through a hole in the roof and falls on the ice.
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