Begin your honeymoon by strolling through Alfama, Lisbon's oldest neighborhood. The cobbled streets, intricate designs of tiles and the scent of grilled sardines filling the air will arouse your senses. Catching a glimpse of St. George's Castle, enjoying the soothing sounds of Fado music, or relishing the panoramic views of the city from the Miradouro Portas do Sol or Castelo Sao Jorge are the perfect ways to start exploring Lisbon.
The only way to get to know a city is by being a part of the local hustle and bustle. You could either traverse through the charming Chiado and take a ride on the classic tram 28; or shop for Portuguese craftwork, wines, and a variety of local cheeses in Baixa and Bairro Alto neighborhoods. You could end the day with a romantic walk hand-in-hand along the Tagus promenade and enjoy sunset at the rooftop bar of Park.
A day dedicated to exploring the stunning and unique modern and contemporary art in Lisbon would be surely worthwhile. Introduce yourself to the Portuguese contemporary scene in the Berardo Collection Museum in Belem. Another option is to walk around the vibrant LX Factory with its trendy shops and cafes, and then wander to the stunningly colorful "Bairro de Padrao dos Descobrimentos". End the day in style with some of the best seafood served in the charming ancient fishing village, Cascais.
Last but not least, take a day trip with your significant other to the fairy tale-like village of Sintra. The extravagant and stunning architecture of the 19th century romanticism period will sweep you off your feet. The numerous historic castles and mansions such as Pena Palace and Quinta da Regaleira are just a few arms away from the profound beauty of the Sintra Natural Park.
If you have less time pay a visit to the historic district of Belem, famous for its cultural and architectural significance. You can also visit the Bolém Tower, Padrão dos Descobrimentos or the Jeronimos Monastery. Furthermore, If you have more time, explore the unique art scene by visiting Art Museum Gulbenkian, National Tile Museum, and Oriente Museum. Wrap up the day by treating yourself to exquisite Portuguese pastry, "Pasteis de Belem" from the famous bakery, Pasteis de Belem.