Which Lisbon tickets to pre-book, and which to skip entirely

The five that genuinely need advance booking

Book these before you fly: the Pena Palace in Sintra, Quinta da Regaleira in high season, the Castelo de São Jorge, the Oceanário between June and September, and the Jerónimos monastery cloister. All five run timed entry, all five sell out on summer days, and the queues at the gate for the walk-up allocation run from 45 minutes to over two hours. Pena is the strictest — its timed slots are enforced to the half hour and the popular mid-morning windows disappear a week or more ahead in July and August.

Costs, for planning: the castle runs around €15, Jerónimos cloister around €12, Pena around €20 including the park, Regaleira in the mid-teens, the Oceanário around €25 and worth every cent if you have children. Buy from the official operators — the state heritage site for Jerónimos, the Sintra parks organisation for Pena, the municipal company for the castle. Third-party resellers list identical timed slots with €5-10 added per ticket, and their cancellation terms are worse. The saving on a family of four is a decent dinner.

The one to skip: Torre de Belém

Skip the Torre de Belém interior. It is a beautiful sixteenth-century tower and it photographs magnificently from the causeway for nothing, but inside it is a cramped set of chambers connected by a single narrow spiral staircase so tight that a traffic light controls one-way flow. On an August afternoon that means 60-90 minutes queueing outside for a shuffling 25-minute experience, with a view from the top that is genuinely inferior to the free one from the Padrão dos Descobrimentos causeway a few hundred metres east. It is the clearest bad-value ticket in Lisbon.

If you want a monument interior in Belém, spend the same money and time on the Jerónimos cloister, which is one of the great pieces of Manueline architecture in Europe and can absorb crowds. The monastery church beside it is free to enter and holds the tombs of Vasco da Gama and Camões — go early, before the coach groups, and you get it nearly to yourself. The Coach Museum across the road is oddly compelling and rarely busy, and the MAAT's ramped roof gives you a river panorama with no queue at all.

Walk-ups: the museums where booking is pointless

The Calouste Gulbenkian, the Museu Nacional de Arte Antiga, the Museu Nacional do Azulejo, the MAAT, the Carmo convent ruins, the Panteão Nacional and the Coach Museum all take walk-ups comfortably, on any day of the year. Admission runs roughly €5-14 each. These are also the most rewarding collections in the city — the Gulbenkian in particular, with its founder's Egyptian, Islamic and European holdings plus the modern wing, deserves half a day and never has a queue longer than three people. Booking online for these buys you nothing but a printing chore.

Two provisos. Check the closing day for each — the Gulbenkian closes Tuesdays, most state museums close Mondays — and check whether a temporary exhibition has its own timed entry, which occasionally applies at the MAAT and the Gulbenkian's modern wing. Also note the last admission rule: 30 minutes before closing at virtually every institution here, and in winter that closing time is 17:00 or 17:30. Arriving at the Azulejo museum at 16:50 in January is a wasted trip, timed tickets or not.

The Lisboa Card: the honest maths

The Lisboa Card costs roughly €27 for 24 hours, €44 for 48 and €54 for 72, and includes unlimited metro, bus, tram and funicular travel, the trains to Sintra and Cascais, and entry to a long list including Jerónimos, the Torre de Belém, the Coach Museum, the Azulejo museum and the Ajuda palace, plus discounts elsewhere. It does not include the Castelo de São Jorge or the Oceanário, which are the two attractions most visitors most want, and that omission is what decides most cases.

It pays off in one specific scenario: a Belém-heavy day where you do the Jerónimos cloister, the Coach Museum and the Torre de Belém, ride the 15E both ways and add the Azulejo museum — that clears €27 comfortably in 24 hours. Over 72 hours at €54 the maths gets harder, because you cannot sustain that museum pace and the transport component alone is worth about €7 a day. Buy the 24-hour card, use it on your monument day, and use a €0.50 Navegante card with zapping credit on the others. That is the version that actually saves money.

Sintra and Cascais: what to book and what to just turn up for

The trains need no booking. Sintra departs Rossio station every 20-30 minutes and takes about 40 minutes; Cascais departs Cais do Sodré every 20 minutes along the coast and takes around 35. Both cost a couple of euros each way with a Navegante card, and both are covered by the Lisboa Card. What does need booking is Pena's timed entry, and in peak months Regaleira's. The Monserrate gardens, the Castelo dos Mouros and the Sintra National Palace in the village take walk-ups on most days.

In Sintra, the 434 tourist bus up to the castle and Pena queues badly from 10:00 — either be on the 09:15 train from Rossio, or walk up the Santa Maria footpath, which takes about 45 minutes of steady climbing through woodland and is genuinely pleasant. Cascais requires nothing pre-booked at all: the old town, the Boca do Inferno cliffs, the Guincho beach buses and the Paula Rego museum are all walk-up. Both towns are day trips that punish a late start far more than they punish a lack of tickets.

Fado, restaurants and the bookings that matter more than monuments

Fado houses in Alfama and Bairro Alto work on a minimum consumption rather than a ticket — commonly €25-60 per person, dinner and wine counting towards it — and the good ones with resident singers need reserving two or three days ahead, more at weekends. Ask for the minimum in writing when you book. The alternative, and it is a real one, is the small tasca-style fado vadio nights where amateurs and locals sing between courses; those cost the price of a meal and cannot be booked, so arrive at 20:00 and be patient.

Restaurant bookings are where advance planning genuinely pays in Lisbon. The city's Michelin-starred kitchens — the Chiado and Alcântara names among them — take reservations weeks out, and the most-hyped seafood cervejarias famously refuse reservations altogether, which means queueing from 18:30 or eating at 23:00. For everything in between, a same-week booking for 20:00 is usually enough, and a 19:30 walk-in almost always works. Time Out Market at Cais do Sodré needs nothing booked but is unpleasant between 13:00 and 14:30 and after 20:00.

Where the ticket money is best spent, ranked

If you have €60 per person for admissions across a long weekend, spend it like this. First, the Gulbenkian at about €14 — the highest quality per euro in Portugal, and the garden is a free bonus. Second, the Castelo de São Jorge at about €15, not for the ruins but for the terrace panorama and the peacocks, booked for 09:00 before the coaches. Third, the Jerónimos cloister at about €12. Fourth, the Museu Nacional do Azulejo at around €8, out east in a former convent and the most underrated ticket in the city.

What to leave out: the Torre de Belém interior, the Santa Justa lift's paid viewing platform, the aquarium-style paid viewpoints that duplicate free miradouros, and any hop-on-hop-off bus, which in a city this compact and this congested is slower than the tram and costs five times as much. The genuinely free tier is strong — every miradouro, the Jerónimos church, the Ribeira das Naus riverfront, the Cacilhas ferry at just over €1 for the best skyline view there is. Build the days around those and pay for four things, not fourteen.