Searching the Internet is often unproductive because Web sites prohibit search engines from indexing their pages. Google is also finding South Korea a challenging environment for Google Maps. The National Security Law (NSL), the basis for censoring Web sites with North Korean content, also prohibits the export of map data to safeguard infrastructure details. For travelers, and the companies that want to profit from helping them navigate, this has presented a challenge. Directions from airports to area hotels can be divined only for mass transit, thanks to publically available routes and schedules.