Built under the reigns of Emperors Septimius Severus and his son Caracalla, the Terme di Caracalla is what remains of once functioning ancient public baths. It is, as of today, one of the best (and largest) remaining examples of a similar structure.

Built under Emperor Vespasian in A.D. 70-72 and completed by his son Titus 10 years later, the Flavian Amphitheatre, or the Colosseum, is a massive stone arena, which at its peak, could accommodate 80,000 spectators. As in the movie 'Gladiator,' the Colosseum has hosted violent and brutal displays of gladiatorial combats and wild animal fights, all just for the delight of crowds. The inauguration lasted one hundred days, and approximately 9,000 animals and 2,000 gladiators were killed during the event. Today, the Colosseum is Rome's most visited sight, which never fails to leave visitors awe-struck. Be sure to also come here at night when it looks even more magical.

For a relaxing day trip, take the train to the former fishing village of Cascais. Here you can stroll on the beautiful decorated streets, experience the lively fish auction held every afternoon next to the main beach, visit "Museu do Mar" to see the rich history of Cascais or take a refreshing walk along the coastal road to Boca do Inferno ("Mouth of Hell") where high waves crash into gigantic caves.