If your trip to Hoan Kiem is all booked but your itinerary is a little on the empty side, let us give you a helping hand.Awesome things to see around the neighborhood? Hoan Kiem Lake and Thang Long Water Puppet Theatre are up there. Head on over and discover what all the fuss is about.There are a range of sights within walking distance of this neighborhood's center, such as Hanoi Opera House. More adventure is waiting for you at Hanoi Old City Gate and St. Joseph's Cathedral, which are also close at hand.