Many visitors see the bridge on a tour of London, whether it be a guided evening cycling excursion, cruise down the River Thames, or hop-on hop-off sightseeing bus. Some travelers also traverse the famous bridge on a walking tour or on their way to the London Bridge Experience and London Tombs. The London Bridge Experience, situated within the still-standing vaults of the old 19th-century bridge, brings visitors on an interactive tour through time, with costumed actors enacting episodes from the bridge’s two-millennia-long history. As part of the experience, the London Tombs takes travelers to a former plague pit to relive some gruesome incidents from centuries past.