Typical are large, natural enclosures, which are embedded in a landscape of forests and stone pits.

These potreros are natural enclosures, with only one principal exit: the narrow connection to higher land.

Sisyphus Shelter is a rockshelter made up of two individual shelters with a natural enclosure of fallen rocks.

It stretched out far beyond what he had expected, turning into a sort of tunnel that led from the falls to a natural enclosure, almost like a theatre.

Although still in use, the Bärengraben has been supplemented since 2009 by the adjacent BärenPark, a larger and more natural enclosure alongside the River Aar.

A side effect of the crater being a natural enclosure is that the lion population is significantly inbred.

Only the most charming animal species are on display (think meerkats, pygmy hippos and white tigers), roaming freely around natural enclosures.

According to one account, the Pound itself was used for keeping horses, and was such a good natural enclosure that the horses became as wild as brumbies.

Visitors to the park can see British animals species past and present, with the animals set in natural enclosures.

Livestock has often been kept on islands, because an island is a natural enclosure, preventing the escape of cattle and sheep.