The following are a list of links which can help you to explore New York City online:

• NY Tourist.com  This is probably the most useful link about NYC that I have ever found.
• Statue of Liberty
• Ellis Island
• Empire State Building
• New York Stock Exchange
• Cathedral of St. John the Divine
• Lincoln Center
• The United Nations
• Radio City Music Hall
• Rockefeller Center
• St. Patrick's Cathedral
• West Point
• Culinary Institute of America
• Carnegie Hall
• Metropolitan Museum of Art
• Manhattan Transit Authority
• Staten Island Ferry