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Photo: Diego Delso, CC BY-SA 3.0 via Wikimedia Commons
A small defensive fortress built in the early 17th century to defend the town against pirates. After being completely renovated in the late 20th century, it is now used as a venue for concerts and art exhibits.
© OpenStreetMap contributors
Archaeological Museum
Has a large collection of indigenous Guanche artifacts, with a focus on pottery.
Historic central square of Puerto de la Cruz with a fountain in the middle, and lots of shops, bars, and restaurants around it.
Likely the oldest building in Puerto de la Cruz, the church was built between 1599 and 1608 and was attached to a no-longer extant Franciscan monastery.
MACEW / Eduardo Westerdahl Museum of Contemporary Art
It was established in 1953 as Spain's first contempoary art museum, in the former Royal Customs House. It has a good collection of modern works by Canary Island artists.
A world class zoo that originally started out as a humble parrot park (hence the name). It features the usual big cats, apes, giant turtles, an aquarium, ... as well as the island's only roller coaster. Shows present parrots, dolphins, sea lions, and – not uncontroversially – orcas doing tricks. Buy your tickets online to avoid some of the queuing at the entrance. You can also buy inclusive coach trips from Costa Adeje/Playa de las Américas, which will take you there for the day and back (about 90 minutes travelling each way). Bringing your own drinks and food is explicitly permitted, with "Picnic areas" provided throughout the park.
Museo Del Pescador
A small museum with ship models.