Gantry Plaza State Park

This massive apartment building has been (and is!) home to many celebrities. Probably best known was the former Beatle John Lennon, who was gunned down outside the building on December 8, 1980, by a crazed fan. Lennon had been living at the Dakota with his second wife, Yoko Ono, who still resides in the building. A memorial to the former Beatle exists nearby in Central Park. The building has become a popular place of pilgrimage for many who admire Lennon.

Yet another unique but rich treat on 5th Avenue, the AIHS is a non-profit organization that educates visitors on Irish American culture and history. Immersive and traditional events are held often along with exhibits showcasing the array of unique art and music. If performing and visual arts aren't your thing, you can visit the library instead with over 10,000 books, newsletters, newspapers, and pieces of literature dating back to the 1700s that feature a wide variety of otherwise unknown topics that are great for anyone interested in European culture and history.

On the 70th floor of the Comcast Building (better known by some as "30 Rock") is this narrow observation deck, built to resemble the deck of a cruise ship. The deck affords uninterrupted views over Central Park to the north and across Midtown to the south.

On this site on April 30, 1789, George Washington stood on a balcony overlooking Wall Street and was inaugurated as the first president of the United States. The old building on the site had been used as New York's city hall and had hosted some of the first congregations of the colonies in the lead-up to the American Revolution, such as the Stamp Act Congress. After the revolution the building, now Federal Hall, briefly housed Congress, the Supreme Court, and Executive Branch offices before the national capital moved to Philadelphia. The current building dates to 1842 and was used first as a Customs House, then later the US Sub-Treasury (millions of dollars of gold and silver were kept in the basement vaults). Today the building is maintained by the National Park Service as a museum dedicated to the history of the site. Guided tours of the building are available, or you can just walk in and look up at the rotunda and view some of the artifacts, such as the bible Washington used in his inauguration ceremony.

On the site of the former World Trade Center towers, the memorial consists of two enormous waterfalls and reflecting pools set within the footprints of the twin towers, lined with bronze panels with the names of the nearly 3,000 victims of that fateful day inscribed. The surrounding plaza holds a grove of trees. The museum, which sits underground right next to the memorial, contains exhibits which explain the events of 9/11 and their aftermath, with remnants of the original towers and artifacts from that day. If you see a white rose on one of the names, it's because today is that victim's birthday.

A memorial to the Holocaust.

Once the Audubon Ballroom where Malcolm X was assassinated with 21 gunshots. Only a part of the facade of the original building remains (Columbia University demolished the building in 1992). The location now houses a memorial to Malcolm X and Betty Shabazz, with a stated goal of advancing human rights and social justice. It also features a 63-foot mural depicting Malcolm X's life.

One of New York's most beautiful parks, an expanse of rolling hills high above the Hudson, contains some of the highest natural elevations on the island and is a great place to picnic or stroll in good weather and look at the great views of the New Jersey Palisades across the river.

Built in 1802 (and physically shifted from its original location), this was the home of Alexander Hamilton, one of the founding fathers and the first Secretary of Treasury.

Collection of more than 200 paintings of the artist, exhibited on three floors of a classic townhouse.

One of the foremost conservatories of those disciplines in the United States.

Constructed between 1858 and 1862, the Reservoir is a vast urban lake that covers 106 acres of Central Park and is the largest body of water within Manhattan. Renamed the "Jacqueline Kennedy Onassis Reservoir" in 1994, the Reservoir is probably best known for the 1.58 mile track that runs around its edge and which is a favorite for joggers, who can both run and enjoy the spectacular views of the city skyline.

The lesser-known historic district on the other side of the Park. It was developed at the turn of the 20th century by Dean Alvord as one of the first suburbs.

Housed in the Alexander Hamilton US Custom House, this Smithsonian museum is the New York branch of the National Museum of the American Indian (the other branches are in Washington, D.C. and Maryland).

This pretty 17-story Beaux Arts building was completed in 1904 and designed to be New York City's first air conditioned hotel. It was a residential hotel, and housed a number of very famous people, including the Hall of Fame baseball player, Babe Ruth; the Italian tenor, Enrico Caruso; the modernist composer, Igor Stravinsky; the Italian conductor of the NBC Symphony, Arturo Toscanini; and writers Theodore Dreiser and Isaac Bashevis Singer. The building is now a condominium.

On a triangular city block between Broadway, Park Row and Chambers Street sits City Hall, a gorgeous gleaming white building completed in 1812, which still hosts the mayor's office and the New York City Council chambers. The building itself is fenced off and only accessible by tour, but there is a lovely park surrounding the building, with plenty of shady trees and a pleasant fountain just to the south of the building. Just north of City Hall and on the same block is the 40.71337-74.005552 Tweed Courthouse, a gorgeous government structure and the legacy of Tammany Hall boss William M. Tweed, who used the courthouse project to embezzle large sums of money from the city budget and was convicted in a courtroom in this building.