The Nature Reserve is open daily from 0930 - 19.00. There is a cross-section of a stalagmite on view, which shows the history of its growth. The cave is also used as a venue for concerts and forms a magnificent auditorium especially for classical music. Amongst these were tunnels for a proto-type gun, the first one ever to be able to fire downwards. The tunnels are a honeycomb network covering some 32 miles.
Some sections are open to the public and others by special arrangement only.
There is graffiti dating back to the 18th century. You can also see the old water supply system. The Museum tells the history of Gibraltar from its prehistoric beginnings to the present day. The Museum is open Monday to Friday from 10.00 - 18.00. Saturday from 10.00 - 14.00.