Among New York City's architects and building buffs, October is Archtober—or Architecture and Design Month. The City's design community opens its doors for more than 100 tours, lectures, films and celebrations, offering behind-the-scenes peeks at the buildings that give this metropolis its distinct character, throughout all five boroughs. This year's theme is "Tracing the Future," focusing on the City's architectural legacy even as the field looks to the future. Past participants include some of the City's more popular attractions—the Museum of Modern Art, Cooper Hewitt, the Guggenheim, the AIANY and its Center for Architecture, Central Park Conservancy and the National September 11 Memorial & Museum among them—as well as more underground experiences like Secrets of Grand Central and tours of the Green-Wood Cemetery catacombs.