This double-decker bus tour is the Washington outpost of an international chain. The company runs four routes during the day on open-top buses, covering the monuments, the White House, the Mall, museums (where you can switch between the red and yellow routes), Embassy Row, the National Zoo, the National Cathedral, Georgetown, and Virginia locations such as the Pentagon and Arlington National Cemetery. The buses are big and thus less likely to fill up than other, smaller tours, and the top level is a great option when the weather’s nice. Tickets are hop-on, hop-off, so you have some flexibility. Though the vehicle is open-top, it doesn’t mean you can stand up, move around, and take pictures—it’s against the rules and can be dangerous. Some of the company’s tours use recorded narration, which is accurate but doesn’t allow for questions.