Eurostar services to and from London were canceled Saturday after a tunnel under the River Thames became flooded, disrupting festive travel plans. Hundreds of travelers trying to get across the ...

A River Roamer ticket on a Thames Clipper allows unlimited stops all day at 20 river piers near the capital's main sights, from Big Ben to the Tower of London to the Cutty Sark.

There are 45 non-tidal locks on the River Thames, including Osney and Iffley in Oxfordshire, Caversham and Shiplake in Berkshire and others in Buckinghamshire, Surrey and Greater London.