On your next visit to Manhattan, take some time and head over to Hoboken, New Jersey. Hoboken is quaint, charming, hip and urban all at the same time. it is pretty much a walking town -- no need to drive a car there.
For $1.75 (one way) you can ride the wonderful PATH trains. Catch the green line from lower Manhattan (WTC Station to Hoboken), or ride from 33rd, 23rd, 14th, 9th or Christopher Streets to Hoboken via the blue line (33rd Street to Hoboken) or the blue/yellow line (33rd Street to Journal Square via Hoboken). The PATH will accept your pay-per-ride MetroCard, but will not take the 7-day-unlimited card or similar.
When there, grab a bite to eat at any of the great eateries, bars or restaurants -- there is something for every taste and every budget, seemingly on every corner -- but be sure to head down to the shores of the Hudson River at Sinatra Park on Frank Sinatra Drive to get some dramatic photos of Manhattan. Best time of day, to me, anyway, is sunset. The sun setting in the west reflects magically on the buildings of the west side of Manhattan.
While you're at Sinatra park snapping gorgeous Manhattan photos, be sure to look for Sybil's Cave. The cave is a landmark of Hoboken, though no longer well known. A spring exists in the cave, which can be visited once again since it was reopened by then Mayor, David Roberts. During the 19th Century many visited the spring to 'take the waters' for health.