大象传媒

Outdoor enthusiast Dougie Vipond and naturalist Ellie Harrison spend the evening at Callanish standing stones on Lewis, celebrating the longest day of the year.

Ellie finds out about the ethereal and beautiful clouds that glow on the edge of space, after the summer sun has set.

There's a live link up with Edinburgh Botanic Gardens' midsummer BioBlitz, where Hermione Cockburn joins families trying to record as many species as possible including beetles, moths and sparrow hawks.

And we find out if round-the-world cyclist Mark Beaumont has won the race against the sun to watch the sunset at beautiful Sandwood Bay.