You're picked up from your chosen hotel in Helsinki city centre at the agreed time. Morning traffic can be heavy, so it's a good idea to be ready in good time — ferry check-in closes 30 minutes before departure.
From the port, you board a ferry for the crossing across the Gulf of Finland to Estonia, arriving in Tallinn at around 11:15.
Your guide meets you at the harbour for a 3-hour guided walking tour of the city. You'll see the main city square, the Tallinn Town Hall, guild houses dating from the Middle Ages, historic towers, Alexander Nevsky Cathedral, Toompea Castle and the 15th-century defensive tower Kiek in de Kök. The tour takes in Tallinn's walled, cobblestoned Old Town, which dates from around the 15th century and is Estonia's only UNESCO World Heritage Site.
After the guided tour, you have free time to explore the Old Town's cafes, restaurants and small shops at your own pace.
At 17:30, you return to the agreed transfer meeting point, where a driver takes you back to the harbour for the ferry's 18:30 departure to Helsinki. You can relax on board and enjoy the on-board services during the crossing, arriving back in Helsinki at around 21:00, where you're transferred back to your pick-up hotel.