Wall Street

The name of the street originates from an actual wall that was built in the 17th century by the Dutch, who were living in what was then called New Amsterdam. The 12-foot (4 meter) wall was built to protect the Dutch against attacks from pirates and various Native American tribes, and to keep out other potential dangers.

The area near the wall became known as Wall Street. Because of its prime location running the width of Manhattan between the East River and the Hudson River the road developed into one of the busiest trading areas in the entire city. During 1699, the wall was dismantled by the British colonial government, but the name of the street remained.

The financial industry got its official start on Wall Street on May 17, 1792. On that day, New York's first official stock exchange was established by the signing of the Buttonwood Agreement, named because it was signed under a buttonwood tree that early traders and speculators had previously gathered around to trade informally, gave birth to what is now the modern-day New York Stock Exchange NYSE.

Manhattan Border War

There is a small part of Manhattan that is physically part of the Bronx borough to the north. It is the neighborhood of Marble Hill. The two boroughs have been playing tug of war over this former island neighborhood for over a century.

The quarrel started with the building of the Harlem Ship Canal, which cut right through Manhattan's northernmost neighborhood, turning Marble Hill into an island. During 1914 the canal was filled in, making Marble Hill now physically part of the Bronx, but still legally part of Manhattan.

Four Most Crowded Islands

Santa Cruz del Islote, located off the Caribbean coast of Colombia, is one of the most densely populated islands on Earth. The 2.4-acre island, home to about 1,200 people or population density of 103,917 people per sq km, was first settled in the late 19th century as temporary housing for fishermen and coconut plantation workers. It sits on a shallow reef and has since grown in landmass to accommodate a growing population. Residents expand the island by adding to the shoreline, using coral, shells, rocks and other fillers to provide a foundation for another home. The only unoccupied space on Islote is a public square about half the size of a tennis court.

Ap Lei Chau or Aberdeen Island, an island of Hong Kong, was a fishing village before the First Opium War. It shelters Aberdeen Harbor, providing excellent protection for fishing boats during a typhoon. The population was 86,782 as of 2007, and its area is 1.30 square kilometers, giving it a population density of 66,755 people per sq km.

Male in the Maldives is one of the most low-lying islands in the world and locals say this is one of the most idyllic places to live. The capital of the Republic of Maldives covers an area of 1.77 square kilometers and is home to about 100,000 people, or 47,415 per sq km. It serves as the political, economic and cultural center of Maldives.

Manhattan island has 2012 population of 1,619,090 that live on a land area of 22.96 square miles (59.5 sq km). This makes 69,464 residents per square mile, or 26,924 per sq km, more dense than any other American city.