Wales's green 'jewel in the hills'

A view of the Great Glasshouse

One of the glasshouse's panes is lowered into place

Firefighters were called in to clean the dome

A Mediterranean landscape has been created

Planting went on in the pouring rain

Rare species grow on the ravine's terraces

The gardens feature exotic plants from across the globe

One of the garden's Georgian buildings

Curator Wolfgang Bopp at work in the glasshouse

The sun glistens on the huge dome