Lower Manhattan is the southernmost part of the island of Manhattan, the main island and center of business and government of the City of New York. It is generally defined as the area delineated on the north by Chambers Street, on the west by the North River (Hudson River), on the east by the East River, and on the south by Battery Park and New York Harbor (also known as Upper New York Bay).

Lower Manhattan includes Wall Street, City Hall, the Municipal Building, the Financial District and the site of the World Trade Center. It is the fourth largest central business district in the United States, after Midtown Manhattan, Chicago's Loop, and Washington D.C.

The neighborhood was previously the third largest. Lower Manhattan's fall to fourth place can be attributed by the district's loss of the World Trade Center, which contributed over 16 million square feet of office space to the area. The square footage lost in the September 11, 2001 terrorist attacks was equivalent to the office space in the entire city of Cincinnati in 2001. It is expected that Downtown will regain its third place ranking after the reconstruction of the World Trade Center, which is expected to yield close to the original center's square footage of rentable commercial space, and the construction of financial firm Goldman Sachs' new headquarters.

Lower East Side: It is hard to believe that this area once housed some of the city's worst slums. Today, rents are rising and yuppies have arrived. The historic Orchard Street Shopping District is home to several hip bars and nightclubs.

Fisherman's Wharf remains one of San Francisco's most popular tourist destinations. The Wharf consists of a long, coast side row of seafood restaurants, street vendors, souvenir stores, and beautiful ocean scenery. Fisherman's Wharf was originally a major fishing pier, and although the fishing industry is still alive today, the main focus of this specific coastal area is its historic tourist attractions. Parking is limited on the Wharf itself, parkinging downtown and takinging a cable car to the Wharf is recommended. Ferry rides are offered for those who would like to visit Marin County. There are numerous attractions and great places to eat (see the other entries for Tourist Attractions and Fisherman Wharf restaurants). Wear comfortable shoes and dress in layers, even during summer months, the breeze off the ocean can be quite chilling. And take your camera. The photo opportunities are fabulous. And don't forget to visit the barking sea lions at Pier 39. The kids will love them, guaranteed!

The core of Midtown Manhattan is from about 31st Street to 59th Street between Third and Ninth avenues (this is the area most commonly referred to as "Midtown.") The "Plaza District", a term used by Manhattan real estate professionals to denote the most expensive area of midtown from a commercial real estate perspective, lies between 42nd Street to 59th Street and between Third Avenue to Seventh Avenue.

Midtown encompasses many neighborhoods including Hell's Kitchen and Chelsea on the West Side, and Murray Hill, Kips Bay, Turtle Bay, and Gramercy on the East Side. It is also sometimes broken into "Midtown East" and "Midtown West", and often "Midtown South."

Midtown Manhattan is indisputably the busiest single commercial district in the United States. The great majority of the city's skyscrapers, including most of its hotels and many apartment towers, lie within Midtown. More than 700,000 commuters work in its offices, hotels, and retail establishments; the area also hosts many tourists, visiting residents, and students. Some areas, especially Times Square and Fifth Avenue, have massive clusters of retail establishments.

Named after the New York Times, which moved here in 1924, Times Square is a vibrant, neon-lit area in the heart of the Theater District. Once populated by peep shows and sex shops, it has undergone a complete image overhaul. Hotels, office towers and commercial businesses have sprung up. Disney has moved in, as well as Condé Nast. Megastores and theme restaurants have also set up shop. Times Square remains the city's favorite venue for New Year's Eve, where a huge street party is highlighted by a glitter ball dropped from Times Tower. The Times Square Alliance which was founded in 1992, works for the improvement and promotion of this most popular New York city attraction.

An engineering masterpiece, this bridge, built in 1937, towers with sturdy grace over the Golden Gate. Stretching over 4,200 feet, it is every bit as awesome an accomplishment in suspension-bridge engineering today as it was over half a century ago. Pedestrians and bike riders can access the east entrance for a jaunt on one of the world's most famous corridors. For photos, or to view the bridge in its entirety, try the spectacular lookout points located at the southeast and northeast ends. Don't miss the historic Roundhouse, a gift shop/visitors center, which boasts a fine selection of souvenirs, and an informative exhibit about the bridge's construction and history.

The National Mall is a bit like Disneyland in the sense that there is no way to fully experience it all in just one day. Part of the original design for the federal city, the massive open space park stretches from the US Capitol to the Lincoln Memorial and around the Tidal Basin to the Jefferson Memorial. It is also where you will find the museums of the Smithsonian, the Vietnam Memorial, the Reflecting Pool and the famous Washington Monument. It was intended to be a place to remember American heroes, to celebrate freedom and to be a forum to exercise freedom in the form of protests and rallies. Numerous festivals and concerts take place on the lawn throughout the year. A gravel path encircles the Mall and is a great place for a sightseeing run or walk. You just might run into a Senator. Certainly any visit to Washington DC should start here on the Mall.

Have you ever seen 400,000 seabirds, 52 species of rock fish and 36 mammal species in one sanctuary? If you haven't, then it's time you visited this sanctuary and witnessed millions of specimens. The Gulf of Farallones Marine Sanctuary covers 948 square miles of the central and northern California coastline. This marine sanctuary is a member of the United Nations Golden Gate Biosphere Reserve. There are millions of different species found in this sanctuary, which makes it a perfect place for a marine biology student. It has workshops and programs especially designed for students. It presents an onsite nursery consisting of harbor seals, elephant seals, harbor porpoises, Pacific white-sided dolphins, rockfish, and seabirds; this is the largest seabird breeding area in the United States. This sanctuary is also the feeding area for threatened blue whales and humpback whales.