Tower of Belem

The Torre de Belém stands sentinel where Portuguese caravels once departed for the New World, a 16th-century fortress that's become Lisbon's most photographed monument. You're here for the extraordinary Manueline stonework covering every surface - twisted rope carvings, maritime motifs, and those famous Moorish watchtowers that blend Christian and Islamic influences. The most famous detail is the rhinoceros gargoyle on the northwest corner, carved to commemorate the first rhino that reached Europe in 1515.

The tower feels smaller than expected when you're standing beneath it, but that intimacy makes the carved details more impressive. Crowds circle constantly with cameras, and the interior queues snake around the base most days. Inside, you'll climb a claustrophobic spiral staircase through former prison cells and ammunition stores to reach the top terrace. The views over the Tagus are pleasant but hardly spectacular, and the narrow stairs create bottlenecks that slow everything down.

Here's what most guides won't tell you - the exterior is genuinely the main attraction, and it's free to admire from every angle. At €6 for adults, the interior feels overpriced for what amounts to cramped medieval rooms and average views. Your time is better spent walking the waterfront promenade for different perspectives, then heading to Jerónimos Monastery where the interior actually justifies the entrance fee.