Travel insights and tips on some of the top attractions and best cities in the world

How much do you know about early American history? If you've been searching for a crash course on how a ragtag band of treasonous rebels built one of the most powerful societies in the world, look no further than the National Constitution Center in Philadelphia. Its location in the historic part of the city is within walking distance of the very place the Founding Fathers ratified the constitution almost 250 years ago.

Just minutes from the Liberty Bell and the building in which the Declaration of Independence was signed stands the Museum of the American Revolution, a magnificent repository of displays, artifacts, and engaging multimedia that will have you hooked from the first exhibit.

It's quite fitting that the first true zoo in the United States originated in the historic city of Philadelphia. In 1874, the Philadelphia Zoo opened with 1,000 animals and an admission price of just 25 cents. Today, over one million visitors enjoy its endearing residents each year. It's regarded as one of the top zoos in America.

If admiring miniature 13-inch, three-pound penguins, a glowering hammerhead shark, and some very friendly hippos sounds like fun, head over to the Adventure Aquarium in Camden to spend a few hours amongst these and other aquatic residents. Adventure Aquarium is bursting with sea life from around the world in extravagant exhibits and massive glass tanks.

The Battleship New Jersey has a long and storied history of maritime warfare. Visitors eager to climb aboard this seasoned battleship and uncover her secrets will be delighted to take part in the Battleship New Jersey museum experience.

What better way to explore Philly than by hopping aboard a Philadelphia Trolley Works Big Bus Tour of Philadelphia? These highly recognizable double-decker buses will take you all over the city, drop you within close proximity of a variety of Philly sights, and provide live narration throughout your journey.