Tour description provided by Viator

Hop on the Eurostar in Paris for an easy day trip to London! After a high-speed train journey of 2 hours and 15 minutes, you’ll have the rest of the day to see top London attractions on a hop-on hop-off bus tour, with sights including Buckingham Palace, Big Ben, Westminster Abbey, the Tower of London and Trafalgar Square. Enjoy informative narration on board and hop off to explore by foot. Also included is a Thames River cruise! This is the perfect way to see London's must-see attractions in a short amount of time. At the end of the day, board the Eurostar and whiz back to Paris.

Meet your host in central Paris early in the morning. You’ll be given your round-trip train ticket and escorted to the station to board the 8:13am Eurostar high-speed train to London. The train ride takes 2 hours and 15 minutes, getting you to London around 9:30am. When you arrive at St Pancras station in London, you’ll be greeted by another host, who'll give you your hop-on hop-off sightseeing ticket and accompany you to the St Pancras station bus stop. After that, you're free to explore this incredible city on your own and spend the day as you please. For the hop-on hop-off tour, take the black Station Connector line to reach your desired stop — you can change to the red line at Baker Street — and board the double-decker bus to begin your tour. Click on 'View Additional Info' to see a map of the routes.Get an overview of London’s sights and history as you cruise through the city and listen to the multi-lingual audio commentary. Hop on and off as you like to explore specific areas by foot. Top London attractions you can see include Buckingham Palace, Big Ben, Westminster Abbey, the Tower of London, the Houses of Parliament, Piccadilly Circus and Trafalgar Square. Take a break from sightseeing by strolling around the city center, visiting a museum, or enjoying a traditional English meal at a local pub. It’s entirely up to you!Your hop-on hop-off ticket also includes a Thames River cruise. Hop off the bus at the Westminster stop and take in London’s scenery from a different perspective as you cruise along one of the most famous rivers in the world.You’ll have up to eight hours in London. At the end of the day, leave enough time to make your own way back to St Pancras train station to board the Eurostar train back to Paris. You’ll arrive at the Gare du Nord station in the evening.