Find great value on US Airways flights from CLT to SJU when you book with CheapOair! Having one of the best harbors in the Caribbean, San Juan is home to many museums, galleries and historic attractions. Old San Juan is home to more than 400 buildings dating back to the 16th and 17th century and offering a unique European charm. San Juan is known for its miles long beautiful beaches, amazing dining scene and lively nightlife. El Morro is a 16th century citadel declared as a World Heritage Site and one of the most visited attractions in the city, take dip into history at the El Castillo de San Cristóbal, this is a Spanish fort covering an area of 27 acres. Make a sure shot visit to the Museo de Las Americas, Luquillo Beach, Ocean Park Beach and the Carolina Beach.