This Guardian and Observer have teamed up with eight eco-attractions in England, Scotland and Wales to offer readers two tickets for the price of one. Please see the Guardian on 11 February and Observer on 12 February 2012 for your voucher.
Eden Project, Cornwall
The Eden Project is an exciting, inspiring playground in which to explore our relationship with nature.
Wildfowl & Wetlands Trust
Enjoy wetland habitats and their wildlife all year round. Get nose-to-beak with thousands of ducks, geese, swans and flamingos, or have the adventure of a canoe or Land Rover safari. WWT's nine centres are; Arundel Wetland Centre in West Sussex, Caerlaverock Wetland Centre in Dumfriesshire, Castle Espie Wetland Centre in County Down, London Wetland Centre in Barnes, Martin Mere Wetland Centre in Lancashire, National Wetland Centre Wales in Llanelli, Carmarthenshire, Slimbridge Wetland Centre in Gloucestershire, Washington Wetland Centre in Tyne & Wear and Welney Wetland Centre in Norfolk. NB: not all activities available at all centres.
Living Rainforest, Berkshire
Discover a different world – explore the wonders of the rainforest without leaving the UK. Over 700 species of plants & animals under one roof.
Centre for Alternative Technology, Powys
One of the Europe's most visited eco-centres, CAT features hands-on displays and practical examples of sustainable living, renewable energy and organic gardening.
National Botanic Garden of Wales, Carmarthenshire
The biggest and best garden in Wales boasts the largest single span glasshouse on the planet – and so much more.
National Wildflower Centre, Merseyside
The National Wildflower Centre is a quirky, family friendly visitor centre offering a mix of nature, art and homemade cakes; a breathing space in the city.
Kew Gardens
There's so much to see at Kew Gardens, from historic glasshouses bursting with tropical colour to peaceful strolls through our 300 acres of historic gardens. Climb 18 metres into the tree canopy for a spectacular bird's-eye view, explore our 3 botanical art galleries or take a tour with one of our passionate guides. Children can also be entertained all day long with family-friendly activities and play areas.
Royal Botanic Garden Edinburgh
Enjoy a visit to the Royal Botanic Garden Edinburgh or one of its three regional Gardens - Dawyck, a world class arboretum, in the Scottish Borders; Benmore, in a majestic mountainside setting in Argyll with its fine restored Victorian Fernery or Scotland's most exotic Garden at Logan near Stranraer.
TERMS AND CONDITIONS: 1. The voucher (printed in paper on 11 & 12 February 2012) entitles the bearer, when a full-price day ticket is purchased, to receive a free day ticket of equal or lesser value for entry on the same day. 2. Only one free entrance ticket per voucher and per full-paying visitor. Voucher must be presented upon entrance and surrendered to the ticket seller. 3. Discount vouchers cannot be used for pre-bookings or in-conjunction with any other offer, reward/loyalty program, group booking, on-line tickets or for events or concerts for which there is a separate charge. 4. Visitors are advised that not all areas may be operational on the day of their visit. 5. All children must be accompanied by an adult. 6. This voucher is not for re-sale, is non-refundable and non-transferable. 7. Photocopies will not be accepted. 8. The voucher is valid for admissions from 11 February to 31 December 2012 with the following exceptions: WWT: not valid bank holidays and weekends in August 2012, Kew: not valid 6-9 April 2012 , 1-6 June 2012 or 25-27 August 2012, and the voucher is subject to the normal operating calendar of each individual attraction. 9. Please visit the attractions' website in advance to confirm opening times/dates and prices.