Possible itinerary for a romantic Berlin

 3-day tour that includes a boat tour and Berlin by night tour:

Day 1:

Morning:

• Start the day by visiting the famous Brandenburg Gate, a symbol of Berlin's history and unity.
• Take a stroll in the beautiful Tiergarten Park, which is just a short walk away from the Brandenburg Gate.
• Visit the Berlin Wall Memorial and Museum at Bernauer Strasse to learn about the city's history.

Afternoon:

• Take a boat tour on the Spree River, which offers beautiful views of the city from a unique perspective.
• Have a romantic lunch onboard or stop at one of the cafes along the riverbanks.

Evening:

• Head to the Prenzlauer Berg neighborhood for a romantic dinner at a local restaurant.
• End the evening with a walk through the Kulturbrauerei, a former brewery now converted into an entertainment center.

Day 2:

Morning:

• Start the day by visiting the Berlin Cathedral, a beautiful historic building with stunning architecture.
• Take a stroll through the nearby Museum Island and explore one or two of its world-famous museums.

Afternoon:

• Visit the Berlin Zoo, which is one of the oldest and most famous zoos in the world.
• Relax and enjoy a picnic in the park next to the zoo.

Evening:

• Take a Berlin by night tour to see the city illuminated in its night lights.
• Enjoy a romantic dinner at a rooftop restaurant or bar with a view of the city.

Day 3:

Morning:

• Take a day trip to the nearby Potsdam, a beautiful city known for its castles and parks.
• Visit the Sanssouci Palace and Gardens, which is a UNESCO World Heritage Site.

Afternoon:

• Walk around the Dutch Quarter, which is known for its charming architecture and quaint cafes.
• Visit the Brandenburger Strasse, a popular shopping street.

Evening:

• Head back to Berlin for a romantic dinner at one of the city's top-rated restaurants.
• End the night with a walk through the famous Checkpoint Charlie, a historic landmark and symbol of the Cold War.

This itinerary provides a mix of historical landmarks, cultural attractions, and romantic experiences that will make for a memorable three-day tour in Berlin.