Prokopské údolí: the limestone valley
Old quarries, a fossil-bearing cliff, a lake, and a railway viaduct striding across the karst. This is a Claude-drafted route awaiting the editor's walk.

1. Nové Butovice
The metro B station at the valley's upper end. Walk down off the plateau and the housing estates give way to the *údolí* (valley) within a few minutes — the descent is the whole transition.

2. The limestone cliffs
Devonian limestone, laid down under a warm sea 400 million years ago and full of fossils. The protected reserve protects the rock as much as the woods. Look, don't hammer.

3. The old quarries
*Prokopské údolí* was quarried for limestone for centuries; the abandoned faces and spoil are slowly going back to scrub and meadow. The *post-industrial* layer is what makes this valley odd and good.

4. Prokop lake
A small lake flooding a former quarry pit, ringed by reeds and cliffs. The turnaround point and the prettiest spot to stop. Foxes work the meadows here at dusk; you'll more likely just hear birds.

5. Hlubočepy viaduct
The stone railway viaduct strides across the valley mouth on tall arches — a working line, so a train may cross while you watch. Walk under it; the scale is best from directly below.

6. Hlubočepy
The tram stop at the valley's lower end. Brush the chalk dust off and take the tram toward *Smíchov* and the centre.

Prokopské údolí: the limestone valley