Sample trips.

A sample trip, made up to show what the AI trip planner builds. Four easy days: the old town and castle, Belém and the riverfront, a day trip to Sintra, and Cascais by the sea. Prices and opening hours are examples; check them before you go.

The classics without the rush: the Louvre and the islands on day one, the Left Bank and the Eiffel Tower on day two, Montmartre and the Marais on day three. Mostly on foot, with the metro for the longer hops.

Ancient Rome on day one, the Vatican on day two, then fountains, piazzas and Trastevere on day three. Walkable once you're in the centre; the metro helps for the Vatican.

Old Tokyo around Asakusa and Ueno, then shrines and street style in Harajuku and Shibuya, then gardens and night views from Shinjuku. Trains link everything.

Lower Manhattan and the harbour on day one, Midtown and Central Park on day two, the High Line, the Village and Brooklyn on day three. The subway gets you everywhere.

Westminster and the royal sights on day one, the City and the South Bank on day two, museums and markets on day three. Many of the big museums are free.