Eilean Donan Castle will switch off its lights as part of conservation group WWF’s Earth Hour.
Owners of buildings and individuals across the world have been asked to turn out lights for 60 minutes from 2030 GMT on 28 March.
The Forth Rail Bridge and Edinburgh Castle are also part of the switch off.
Christ the Redeemer statue in Rio de Janeiro, the Eiffel Tower and Sydney Opera House will also be blacked out.
Book Falkirk tours on 07305-294773.
Phone 0800-6190575 for taxi bookings.
- The Kelpies are the largest equine sculptures in the world.
- Private tours of Falkirk’s greatest attractions
- Falkirk tours run five days a week
Kelpies t-shirts, prints and phone cases can be bought online .
A taxi from Edinburgh to St Andrews costs £85.
Mary Queen of Scots tours – visit the key places in the life of Mary . From £210 for private groups up to 4 people . Phone 07305-294773 for more details .