Valdimir Putin during his vacation in Russia's Tyva Republic
© AP Photo/ RIA Novosti, Alexei Drizhinin, Pool Russian Prime Minister Dmitry Medvedev during his vacation on the Volga River in Russia's Astrakhan Region
© ITAR-TASS/Mikhail Klimentyev German Chancellor Angela Merkel and her husband Joachim Sauer walk in the thermal baths of Sant'Angelo d'Ischia, southern Italy, 2013
© AP Photo/Marco Cantile, Lapresse US President Barack Obama plays golf on the firs day of his vacation
© EPA/Vincent DeWitt Spain's King Felipe with his wife Letizia and daughters in downtown Mallorca island
© EPA/BALLESTEROS Nicolas Sarkozy with his then-girlfriend, Italian singer and ex-model Carla Bruni in Egypt
© EPA/KHALED EL FIQI Britain's Prince Charles (center) with his sons Harry (left) and William (right) in Monbiel near the Swiss resort of Klosters
© AP Photo/Keystone, Arno Balzarini British Prime Minister David Cameron with his wife Samantha in Cornwall, England
© AP Photo/ Ben Birchall, pool Japanese Crown Prince Naruhito, Crown Princess Masako, and their daughter Princess Aiko feed the carp swimming in a pond during a visit to Shiosai Park in Hayama, Kanagawa prefecture, near Tokyo
© AP Photo/Kazuhiro Nogi, Pool Belgian King Philippe cycles with his children Gabriel (right) and Emmanuel during a family holiday on the Island of Yeu, southwestern France
© AP Photo/Yves Herman, pool Denmark's Queen Margrethe and her French-born husband Prince Henrik in their Chateau de Caix residence in southwestern France
© AP Photo/Remy Gabalda Dutch King Willem-Alexander with his mother Beatrix, wife Maxima and daughters princess Catharina-Amalia (center) and princess Alexia at their Italian holiday residence in Tavernelle
© EPA/Evert-Jan Daniels