The observatory at One World Trade Center will celebrate its one-year anniversary this month by hosting a free open house. Ticket-holders will get to travel up the tower’s 104 stories and experience ...

There's a new bird's eye view of New York City. The One World Trade Center observatory officially opened to the public on Friday with a ribbon-cutting ceremony. Visitors will get a view of the city ...

Which is the tallest building in America? Learn about the tallest building in America, its special features, uses, history, global rank and top U.S. towers.