Portbraddon Cave

{{Short description|Cave and archaeological site in Northern Ireland}}

{{Use dmy dates|date=April 2022}}

{{Infobox ancient site

| name = Portbraddon Cave

| native_name =

| native_name_lang =

| alternate_name =

| image =

| image_size =240

| alt =

| caption =

| map =

| map_type = UK Northern Ireland#United Kingdom

| map_alt = Portbraddon Cave

| map_caption = location in Northern Ireland

| map_size = 240

| altitude_m =

| altitude_ref =

| relief = yes

| coordinates = {{coord|55|14|54|N|6|28|32|W|display=inline,title}}

| map_dot_label =

| location = Portbraddon, County Antrim

| region = Northern Ireland

| type = sea cave

| part_of =

| length =

| width =

| area =

| volume =

| diameter =

| circumference =

| height =

| builder =

| material =

| built =

| abandoned =

| epochs = Mesolithic

| cultures =

| dependency_of =

| occupants =

| event =

| excavations = 1930s

| archaeologists = Andrew McLean May

| condition =

| ownership =

| management =

| public_access =

| other_designation =

| website =

| architectural_styles =

| architectural_details =

| notes =

}}

Portbraddon Cave (also spelled Portbradden, Portbraddan) is a relict sea cave located near Portbraddon, County Antrim on the north coast of Northern Ireland. Its located {{convert|5|m|ft|0|abbr=on}} above the present-day high water mark which makes it important archaeologically, as it would have been inhabited as far back as the Mesolithic.{{cite web| last=McInroy| first=Andy| work=Great Sea Caves of Antrim| title=Chapter 7: The Caves of Prehistoric Man, Whitepark Bay| url=http://www.andymcinroy.com/5port7.htm| access-date=2011-11-07}}

In the 1930s the cave was the subject of an archaeological dig by Andrew McLean May, who made a number of notable finds. During the course of the excavations, which went as deep as {{convert|2|m|ft|0|abbr=on}} below the modern floor level, May encountered: iron objects, including the barrel of a muzzle-loading pistol; pottery and flint tools, some of which showed Mesolithic characteristics; fireplaces and animal bones and ultimately the original water-worn floor of the cave. Most notably May also discovered partial remains of three human females. They were examined by Professor Thomas Walmsley at Queen's University Belfast, who noted that "most of the bones have primitive features which are not likely found together in post-medieval time; and there are some characteristics which suggest an epi-palaeolithic inheritance."{{cite web| last=McInroy| first=Andy| work=Great Sea Caves of Antrim| title=Chapter 7: The Caves of Prehistoric Man, Whitepark Bay| url=http://www.andymcinroy.com/5port7.htm| access-date=2011-11-07}}
Originally published: {{cite journal| last=May| first=Andrew McLean| title=Portbraddan Cave, County Antrim| journal=Ulster Journal of Archaeology| series=3| volume=VI| pages=39–61| year=1943}}

The whereabouts of the human bones have since become unknown, and they have not been subjected to modern radiocarbon dating techniques.