24 hours in pictures

New York, USA: A large gathering of people participate in a free yoga class in Times Square to celebrate the summer solstice Photograph: Justin Lane/EPA

Athens, Greece: Visitors on the roof of the Acropolis museum Photograph: Petros Karadjias/AP

Vallejo, USA: A Bengal tiger dives after a piece of meat at Six Flags Discovery Kingdom Photograph: Justin Sullivan/Getty Images

Kokino, Macedonia: The summer solstice sun rises over the ancient observatory, which is believed to be over 4,000 years old Photograph: Robert Atanasovski/AFP/Getty Images

Ahmedabad, India: A cow rushes through a crowd of Hindu devotees waiting to watch the chariot of Lord Jagannath, during the 135th annual Rath Yatra, or chariot procession Photograph: Amit Dave/Reuters

New York, USA: Members of the Castellers de Vilafranca build a human tower during a world record attempt Photograph: Timothy A. Clary/AFP/Getty Images

Tiszainoka, Hungary: Long-tailed mayflies fly over the surface of the Tisza river. Millions of the insects engage in a frantic rush to mate and reproduce before they perish in just a few hours every year Photograph: Laszlo Balogh/Reuters

Morris Township, USA: A seven-year-old cools off at a pool in New Jersey Photograph: Bob Karp/AP

Rafah, Gaza: A Palestinian man kisses the body of Ghaleb Ermilat, 21, killed in an Israeli military strike Photograph: Eyad Baba/AP

Ningbo, China: A woman eats dim sum as a window cleaner works outside on the 23rd floor of a hotel Photograph: Peter Parks/AFP/Getty Images

Prague, Czech Republic: Czech football fans board a train bound for Warsaw to watch their team play against Portugal in the Euro 2012 quarter-final Photograph: Michal Cizek/AFP/Getty Images

Zurich, Switzerland: A false tomato frog swims in the water of an aquarium Photograph: Steffen Schmidt/EPA

Beijing, China: A man sleeps next to a bicycle on a footpath Photograph: David Gray/Reuters

Fuzhou, China: An addict is forced to wear a helmet to prevent him from hitting the wall with his head at a police-run rehab centre for drug addicts Photograph: Liu Tao/EPA