A double-decker city tour bus runs from near Hoan Kiem Lake through major points in central Hanoi. The one-hour or one-hour-thirty-minute route passes St. Joseph's Cathedral and the Ho Chi Minh Mausoleum, and comes with Korean audio commentary and earphones. Tickets can be bought on site at a red ticket booth near Hoan Kiem Lake, across from Lotteria. The 24-hour pass lets riders get off to sightsee and board the next bus, and heavy traffic can make even the one-hour route take longer.