Our planet is getting more crowded every day. We've collected photos from around the world of some really tight spots. Here, people play on a beach in Qingdao, in east China's Shandong province, on July 28, 2007.
Job fair in Chongqing, China
Thousands of job seekers flock to a job fair in the city of Chongqing in China's Sichuan province on Oct. 18, 2008.
People cross Tai Ping Bridge as they participate in the "bridge-treading" event in Jushui town of Mianyang, Sichuan province
People cross Taiping Bridge as they participate in the "bridge-treading" event in Mianyang in Sichuan province, China, on March 24, 2011. Participants throw old clothes and coins from the 200-year-old bridge into the water during the traditional annual event to promote happiness and health, according to local media.
Student dormitory in Wuhan, Hubei province, China
Laundry hangs outside a student dormitory in the Chinese city of Wuhan in Hubei province on March 5, 2009.
Hong Kong slum family
A low-income family living in a slum in Hong Kong.
Hong Kong slum
An elderly person living in a Hong Kong slum.
Hong Kong slum housing
A family crowds into a slum dwelling in Hong Kong.
Rex Features Ltd
Swimming pool in Suining, Sichuan province, China
Space is hard to come by as a swimming pool fills up with people trying to beat the heat in Suining, Sichuan province, China, on July 4, 2010.
Motorists in Taipei, Taiwan, traffic
Motorcyclists crowd an intersection during rush hour in Taipei, Taiwan, on Oct. 29, 2009.
Hong Kong 'satellite town' of Po Lam
Public residences are seen in Po Lam, one of Hong Kong's "satellite towns," on Sept. 14, 2011. This southern Chinese city is described as a concrete forest, famous for its many high-rise commercial and residential towers.
Train station in Jakarta, Indonesia
Passengers look out from a crowded train at the main station in Jakarta, Indonesia, on Oct. 20, 2006, as they return to their hometown.
Churchgate railway station in Mumbai, India
Commuters pile out of crowded suburban trains during the morning rush hour at Churchgate railway station in Mumbai, India, on July 11, 2012. According to a 2011 census conducted by the government of India, Mumbai has a population of more than 12 million.
South Korean World Cup soccer fans watch match
South Korean soccer fans gather at the Seoul City Hall Plaza June 23, 2010, to watch a live TV broadcast of the 2010 World Cup soccer match against Nigeria held in Durban, South Africa.
Phnom Penh, Cambodia, garment workers
Garment workers in Phnom Penh, Cambodia, ride home in a van on March 31, 2007.
Biswa Ijtema pilgrims at Bangladesh train station
A train swarming with pilgrims leaves an airport rail station in Bangladesh on Jan. 29, 2006. Muslims from around the world congregate annually on the banks of river Turag on the outskirts of Dhaka to participate in Biswa Ijtema, the second largest Islamic pilgrimage after the hajj.
Housing in Amman, Jordan
Housing in Amman, Jordan.
Martin Westlake/Gallery Stock/Galeries/Corbis
Travemuende holiday resort in Luebeck, Germany
Sunbathers and roofed wicker beach chairs dot the beach along the Baltic Sea bay of Travemuende, a popular holiday resort near the northern German city of Lubeck, on Aug. 5, 2007.
Morris Mac Matzen/Reuters
Manny Pacquiao-Ricky Hatton fans in Manila, Philippines
Fans watch the boxing match between Manny Pacquiao of the Philippines and Ricky Hatton of Great Britain for the junior welterweight title at a free screening at a city gymnasium in Tondo, Manila, on May 3, 2009. Pacquiao, a national hero in the the Philippines, knocked out Hatton in the second round.
Commuters at train station in Manila, Philippines
Commuters line up outside a train station in Manila, Philippines, on June 16, 2008.
Rush hour traffic in Jakarta, Indonesia
A man rides a bicycle in a bus lane next to a morning rush hour traffic jam in Jakarta, Indonesia, on Nov. 10, 2011.
Sao Paulo, Brazil, aerial photo
An aerial view of Sao Paulo, Brazil.
Mong Kok district in Hong Kong
People cross a street in the Mong Kok district of Hong Kong on Oct. 4, 2011. Mong Kok has the highest population density in the world, squeezing in 340,000 people per square mile.
Lloyds of London Remembrance Day service
Lloyds of London staff members observe the auctioneer's annual Remembrance Day service at the Lloyds Building in London on Nov. 11, 2011.
Roman Catholic pilgrims press together while following the image of the local saint Our Lady of Nazareth as it is paraded during the annual Cirio de Nazare procession in Belem, Brazil
Roman Catholic pilgrims press together to follow the image of the local saint Our Lady of Nazareth as it is paraded during the annual Cirio de Nazare procession in the city of Belem, Brazil, on Oct. 11, 2009. It is the country's biggest religious festival.
Entrance exam for postgraduate studies in Wuhan, China
Applicants gather to take entrance exams for postgraduate studies in Wuhan, Hubei province, China, on Jan. 10, 2009.
Passengers travel atop a train headed for Mymensing from Dhaka
Passengers travel atop a train from Dhaka to Mymensing, Bangladesh, on Sept. 19, 2009. Millions of Dhaka residents leave the capital city each year ahead of the Muslim Eid al-Fitr holiday, which marks the end of the fasting month of Ramadan, to join their families.
Commuter train in Jakarta, Indonesia
People hold onto the entrance of a commuter train heading to Jakarta, Indonesia, on May 31, 2010. According to operator PT Kereta Api Indonesia, its trains run 300 commuter cars each day, serving an estimated 500,000 passengers in the Jakarta area. Dozens of train deaths occur each year in Jakarta, with many due to electrical shock or people falling off train roofs.
La Paz, Bolivia, aerial photo
An aerial view of La Paz, Bolivia
John Elk/Getty Images
Bangladeshi Muslim devotees return home in an over-crowded train and boat after the World Congregation of Muslims, or Biswa Ijtema, on the outskirts of Dhaka, Bangladesh
Muslim pilgrims return home in overcrowded trains and boats after the World Congregation of Muslims, or Biswa Ijtema, on the outskirts of Dhaka, Bangladesh, on Jan. 24, 2010.