National parks and reserves

A glacial lake at 2,034 m in the Bâlea cirque of the Făgăraș Mountains, at the top of the Transfăgărășan; reachable by car in summer and by cable car all year round.

Romania's first urban nature park: 183 ha of ponds, reed beds and willows inside an abandoned reservoir in southern Bucharest, home to over 180 bird species, otters and foxes, a few hundred metres from the tower blocks.

A roughly 90 m waterfall that drops in several tiers down a limestone wall in the Rodna Mountains, above the resort of Borșa; reached by chairlift and a short forest walk.

Romania'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.

The narrowest stretch of the Danube Gorge, between Dubova and Ogradena: the river squeezes between limestone walls, with Serbia on the far bank, seen by boat or from Ciucaru Mare.

A 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.

A natural dam lake formed in 1837, when a mountainside blocked the Bicaz valley; the trunks of the drowned forest still rise from the water, at the upper end of the Bicaz Gorge.

A roughly 30 m, two-tiered waterfall at the foot of the Vlădeasa massif, on the Stanciului valley near Răchițele; the water fans out over the rock like a veil, and in winter the frozen wall is an ice-climbing spot.