Gibraltar: what to see and where to eat
Everything below comes from open data and each row says where it came from. We have not been to any of these places and we do not rank them.
Things to see

Gorham's Cave
natural sea cave in the British Overseas Territory of Gibraltar; one of the last known habitations of the Neanderthals in Europe

James Cridland from London, UK / CC BY 2.0
Moorish Castle
medieval fortification in Gibraltar

St. Michael's Cave
cave in the British Overseas Territory of Gibraltar

Cathedral of St. Mary the Crowned
Roman Catholic cathedral in Gibraltar

Gibraltar Museum
national museum

Cathedral of the Holy Trinity
cathedral for the Church of England Diocese of Gibraltar

Gibraltar Botanic Gardens
botanical garden in Gibraltar

Malcolm Tredinnick from Sydney, Australia / CC BY 2.0
Catalan Bay
fishing village in Gibraltar

Carteia
ancient city and archaeological site at San Roque, Spain

Gipmetal77 modded by Victuallers / CC BY-SA 3.0
Vanguard Cave
cave in Gibraltar

Shrine of Our Lady of Europe
Catholic church in Gibraltar

Antonio Montaigu de la Perille / Public domain
Devil's Tower
archaeological site
Places to eat
Costa
Food: coffee shop
Costa
Food: coffee shop
Costa
Food: coffee shop
Costa
Food: coffee shop
Costa
Food: coffee shop
La Perla del Sur
Food: fish, regional, grill, seafood, mediterranean, friture, local, spanish
Café Rojo
Food: modern
La Tapilla Sixtina
Food: tapas
Sacarello’s
Food: coffee shop, fish and chips
Costa
Food: coffee shop
Curry and Sushi
Food: indian, japanese, sushi
Opening hours and tickets: OpenStreetMap contributors. Each one shows the day a volunteer last wrote it down, so check the official site before you set out.