To real estate insiders, Rosslyn has very strong advantages that are turning it into one of the region’s booming residential markets. In addition to the newer developments, residential buildings come in a mix of different styles, from plain brick apartment units to contemporary townhouses to towering high rises, some sparkling new, some built several decades back. There are a few detached homes, mostly boxy colonials and duplexes, but most of the properties for sale are condos. But, the neighborhood is not only about tall skyscrapers and the hustle and bustle of a downtown area. Once one travels off the main path, there are parks and trails galore. The Custis Trail, perhaps the most famous, brings a soft and lush landscape to the dweller. Theodore Roosevelt Island Park lies within its boundary. Rosslyn is bounded by Highway 110 and I-66 to the east; Lee Highway to the north; Rhodes Street to the west; and 12th Street and North Marshall Drive to the south.