Before summer draws to a close, check out our selection of hot spa and beauty experiences around London and Paris. Both the UK capital and the City of Light are two of the most visited destinations in the world and if you're hitting them, make sure you don't miss out on these spa treatments they have to offer. Aveda Institute, 174 High Holborn, London WC1V 7AAThe all-natural Aveda Institute at High Holburn is a big draw with the city's beauty fans. Among the most popular treatments are the "Stress-Fix" options, which all incorporate the Stress-Fix aroma (with lavender, lavandin and clary sage) throughout each treatment.