Five thousand years before the marina strips, people built stone tombs on the hills above what is now Portimão. The Megalithic Monuments of Alcalar (Monumentos Megalíticos de Alcalar) are a Copper Age necropolis in Mexilhoeira Grande – roughly fifteen to twenty minutes inland from Alvor and Praia da Rocha. You walk through a fenced hilltop cemetery of passage graves and dome tombs, with Tholos 7 as the showpiece you can actually step inside. It is quiet, slightly eerie, and a world away from the seafront noise. If you like history that predates castles and Romans, this is the western Algarve’s essential stop.
History of the site
Around 2500 BC, in the third millennium BC, a community settled a limestone ridge near the old course of the Torre river, about five kilometres from today’s Mexilhoeira Grande. The living village and the dead were kept apart in the hills: archaeologists have traced roughly eighteen megalithic tombs built over generations, using different styles as burial customs shifted.
These are not random stone piles. Families built rectangular mounds and later the round tholos tombs – corridor passages leading to vaulted stone chambers. Excavations found bodies placed in the fetal position, with bones sometimes moved into shared spaces after flesh decayed, which tells us ritual mattered as much as storage. Tholos 7, built in that same era, became the scientific heart of the site: a cairn roughly 27 metres across, with an east-facing passage lined with limestone slabs that funnel you toward a central crypt.
Scholars have known about Alcalar since the late nineteenth century. The complex was listed as a National Monument on 16 June 1910 – one of Portugal’s earliest protected heritage sites. The modern story is about rescue: the state began buying land around Tholos 7 in 1975, fenced the core in 1976, and acquired the rural house Courela das Minas in 1982. Major digs in the 1990s clarified how the tombs were used.
In October 2000, the Centro de Acolhimento e Interpretação (welcome and interpretative centre) opened, giving visitors context before they cross into the necropolis. Management later passed to the Museu de Portimão partnership, with consolidation work on Tholos 7 and survey of neighbouring monuments continuing into the 2010s. Today two tombs are open for public entry, with the centre handling tickets and explanation – still the same hills, but now you can understand what you are standing on.
Who should go
Travellers who want one inland morning that is not another castle. Portimão and Alvor guests with a hire car – the lanes are narrow but signed from the EN125. Couples and older teens who read the panels and do not need a theme-park payoff every hour. Rainy or windy coast weeks when boats cancel and the museum afternoon is already done.
Skip for toddlers who need running space, or groups on a four-day beach-only sprint. This is a thinking person’s detour, not a photo backdrop with ice cream.
What your visit feels like
You park below the ridge, buy a ticket at the centre (or use the combined ticket with Museu de Portimão in town), and watch a short introduction to Copper Age life – settlement, funeral rites, stone working. Then you enter the fenced necropolis: low hills, granite and limestone, paths between mounds. Tholos 7 is the moment that sticks – ducking along the passage, standing in the chamber, imagining torchlight five millennia ago.
The whole loop is one to two hours if you read fairly. Summer heat builds on the open hillside – go early. There is no cafe on site; plan lunch back in Portimão, Alvor, or Silves.
Practical tips
Address: Monumentos Megalíticos de Alcalar, 8500-120 Mexilhoeira Grande. Phone: +351 282 248 594 (Portimão Museum). Confirm hours on museudeportimao.pt before you drive – they change with season.
Typical hours (check before travel): 1 September to 14 July, Tuesday to Saturday 10:00-13:00 and 14:00-16:30 (closed Sunday, Monday, and national holidays). 15 July to 31 August, Tuesday to Saturday 10:00-13:00 and 14:00-18:00, plus Sunday mornings 10:00-13:00 (closed Monday). Last entry is 15 minutes before closing.
Tickets (guide prices – confirm on site): about €2 standard; about €4 combined with Museu de Portimão; reduced tickets for over-65s and ages 16-25. Portuguese residents often get free entry on selected Saturdays (low season) or Sundays and public holidays (August) – check the museum site for current free days.
Getting there: From Portimão or Alvor, take the EN125 toward Lagos, turn north at the Alvor junction, then follow signs via Penina toward Senhora do Verde and Alcalar. Allow 15-25 minutes from Praia da Rocha depending on traffic. Buses run from Portimão on some schedules – a car is simpler for the timing.
Pair it with: Castelo de Silves on a full culture day, or the Museu de Portimão factory museum on a breezy afternoon before Alcalar the next morning.
Worth it?
Yes for any week longer than five days in Portimão, Lagos, or Alvor when you want depth beyond sand. Skip if history bores the group or you cannot align with the short weekday hours. Combine with top things to do in Portimão as your inland culture pick.
Next: Read where to stay in Portimão, book car hire if you are bus-only, and check the museum timetable before a Tuesday-to-Saturday morning run.