This summer sees the tenth annual Sculpture Trail At Hebden Bridge. For just four weeks this steep-sided densely wooded valley, through which the Hebden Water flows past Gibson Mill to reach the River Calder, is home to over 40 artworks.

Anyone venturing into the woods should look closely in the undergrowth and through the branches of the trees. The strange, often multi-coloured objects hiding there could be the work of internationally renowned artists or of children from local schools.

We found this when we followed the trail in 2004

Getting your work included in the Sculpture Trail is open to any artist or group. The organisers chose the exhibits from the proposals they are sent but no damage to trees or the environment in general is allowed and all earthworks and holes dug must be refilled and the area returned to its existing state.

This year's trail includes a new sculpture by Hebden Bridge artists George Morris and Andrew Livingston. Entitled "If pigs could fly they wouldn't need ladders," it is inspired by the music of surreal rocker Frank Zappa.

Zappa, who came to fame in the 1960s with his band the Mothers of Invention, released more than 60 albums before his death from prostate cancer in 1993 at the age of 52. His output embraced a wide range of music from doo-wop to the avant-garde.

The two artists have previously expressed their enthusiasm through painting - 22 works inspired by Zappa's music were shown in Bradford's Yorkshire Craft Centre in 2003. They say: "We'd both been listening to the music of Frank Zappa whilst working on our first series of paintings about the entertainment industry and enjoyed the humour and satirical nature of the work. It seemed a natural progression to use Zappa's music as an inspiration...The great thing about Zappa's work is that even though some of the songs were written 40 years ago they are still relevant today."

National Trust wardens show our intrepid reporter that not everything in the forest in man-made

But pigs are not the only things that might be flying at Hardcastle Crags. This area of outstanding natural beauty owned by the National Trust provides a home for many birds including all three British woodpeckers, dippers, kingfishers, herons, grey and pied wagtails, tawny owls, barn owls, little owls, buzzards, pied flycatchers and bats. Closer to the ground, often in and amongst the sculptures, are giant anthills built by the rare northern hairy wood ant.

While the natural wonders of Hardcastle Crags can be seen all the year round in various guises, the sculpture trail, including George and Andrew's sculpture, will only be on show until August 7th. However, a number of events ranging from guided walks to a "MisGuided Tour" will take place during while these amazing objects are on show!

To find out how to get to Hardcastle Crags go here.

The Sculpture Trail at Hebden Bridge is on show from Saturday July 9th to August 7th.