From Lisbon central - Cais do Sodré - I took the train a few kilometers along the coast to see some famous landmarks including the Tower of Belém, a defense tower completed in 1519. LX Factory is an industrial complex constructed in 1846 that is now used to house an outdoor market, creative shops, and restaurants.
An accidentally bought day pass for the trains brought me to Cascais, a mid-size city 30km west of Lisbon. It was a nice town to walk around in for the evening before training back to Lisbon.