Porto.

For our last evening in Porto, we ventured out to the Jardins do Palácio de Cristal to watch the sunset on the Douro River. The gardens are so beautiful and worth spending a couple of hours walking around and exploring.

From Lonely Planet:

Sitting atop a bluff, this gorgeous botanical garden is one of Porto’s best-loved escapes, with lawns interwoven with sun-dappled paths and dotted with fountains, sculptures, giant magnolias, camellias, cypress and olive trees. It’s actually a mosaic of small gardens that open up little by little as you wander – as do the stunning views of the city and Rio Douro.