Washington, D.C.'s Southwest Waterfront is a study in contrasts: The neighborhood retains some of the most historic architecture in the federal capital and boasts one of the largest private development projects in the city, the District Wharf. Laid out by the Carroll family in the 1770s, the neighborhood teemed with commercial activity by the 1830s. In the mid-20th century, huge swaths of the area were demolished in the name of urban renewal. Carolyn Muraskin, founder of DC Design Tours, leads a tour of the historic neighborhood.