The island is host to an oil refinery and several large gas holders.

Nothing remains but a single gas holder, built in 1886.

The site had two very large gas holders.

The gas was turned off at the gas holder.

Two were placed on huge gas holders, completely destroying one.

Being literal rather than legal landmarks, the gas holders were removed in 2001.

The gas holder may be the largest structure the town will ever see.

One of the two gas holders also remains.

A third gas holder not shown on the map was installed at a later date, but has since been demolished.

This deadline was not met by almost four years - the final gas holder wasn't demolished until September 2002.