# Gruta do Caldeirão, Portugal: what it is and when to go > Gruta do Caldeirão is a cultural heritage monument in Tomar, Portugal. Interests: Nature. The best time to visit is April to October. In June there are 14 h 47 of daylight, and in December, 9 h 13. It has an article in one Wikipedia, so it is not one of the busiest places in Portugal: one to enjoy at a calmer pace. Here is what it is, where it lies, when to come, how to get there and what else is nearby to turn it into a trip. - Address: https://kokai.app/en/paises/europa/portugal/gruta-do-caldeirao/ - Reviewed on: 2026-10-02 - Language: en ## In a nutshell - **What it is:** Cultural heritage monument in Tomar, Portugal · Nature - **Where:** Portugal - **Best time:** April to October. - **Nearest airport:** LIS Lisbon, 115 km as the crow flies - **Coordinates:** 39.64701, -8.41621 ## What it is and where Gruta do Caldeirão is a cultural heritage monument in Tomar, Portugal. It has an article in one Wikipedia, so it is not one of the busiest places in Portugal: one to enjoy at a calmer pace. Estreita galeria em meandro (largura entre 1,5 e 4 metros), com entrada virada a sul, dominando um vale muito encaixado, disposto perpendicularmente ao canhão do Nabão. Durante a Pré-História, a gruta foi usada fundamentalmente como necrópole (embora tamb Its coordinates are 39.64701, -8.41621; the nearest main airport is Lisbon Humberto Delgado Airport (LIS, Lisbon), 115 km as the crow flies. How to get around Portugal (train, car, bus) is covered in [its country guide](https://kokai.app/en/paises/europa/portugal/#moverse). - [Where it is](https://www.google.com/maps/search/?api=1&query=39.647013%2C-8.416208) - [Directions](https://www.google.com/maps/dir/?api=1&destination=39.647013%2C-8.416208) It is one of the [Nature](https://kokai.app/en/paises/europa/portugal/naturaleza/) places in Portugal. In [Kokai](https://kokai.app/en/) it is already on your trip map next to the places you save yourself, and it goes into a day's plan with one tap. ## When to go The best time to visit Gruta do Caldeirão is **April to October**. | Mes | Época | Hours of daylight | | --- | --- | --- | | January | Possible | 9 h 30 | | February | Possible | 10 h 30 | | March | Possible | 11 h 41 | | April | Best time | 13 h 03 | | May | Best time | 14 h 11 | | June | Best time | 14 h 47 | | July | Best time | 14 h 32 | | August | Best time | 13 h 34 | | September | Best time | 12 h 15 | | October | Best time | 10 h 56 | | November | Possible | 9 h 46 | | December | Possible | 9 h 13 | In June there are 14 h 47 of daylight, and in December, 9 h 13. Daylight hours are calculated from the site's latitude for the 15th of each month; when planning a full day on foot they matter as much as the weather. When to go to Portugal in general, with its festivals and peak seasons, is in [its country guide](https://kokai.app/en/paises/europa/portugal/#cuando-ir). ## Before you go to Portugal To enter Portugal there are 6 things to sort out before you leave, starting with “Valid ID card (DNI) or passport”: they are all, with their deadlines, in [the Portugal checklist](https://kokai.app/en/paises/europa/portugal/#antes-de-salir). Currency: Euro (EUR); plugs: Type C and F · 230 V · 50 Hz (the same as in Spain); emergencies: 112. In [Kokai](https://kokai.app/en/) you tick off the checklist inside your trip, and each item reminds you when it is time to do it. ## What is nearby - [Cervejaria do Fernando](https://kokai.app/en/paises/europa/portugal/cervejaria-do-fernando/): Brewery · 4.7 km - [Casa da Vera](https://kokai.app/en/paises/europa/portugal/casa-da-vera/): Brewery · 4.7 km - [Pegões Aqueduct](https://kokai.app/en/paises/europa/portugal/aqueduto-dos-pegoes/): Aqueduct in Tomar, Portugal · 4.8 km - [Igreja de São João Baptista](https://kokai.app/en/paises/europa/portugal/igreja-de-sao-joao-baptista/): Church building in Tomar, Santarém District, Portugal · 4.8 km - [Convent of Christ](https://kokai.app/en/paises/europa/portugal/convent-of-christ/): Cultural heritage monument in Tomar, Portugal · 4.8 km Distances are as the crow flies. Everything else is in [the Portugal guide](https://kokai.app/en/paises/europa/portugal/). ## More in Portugal: Nature - [Jerónimos Monastery](https://kokai.app/en/paises/europa/portugal/monasterio-de-los-jeronimos/): building in Santa Maria de Belém, Lisbon District, Portugal - [Mount Pico](https://kokai.app/en/paises/europa/portugal/montana-del-pico/): stratovolcano in the Azores and the highest mountain of Portugal - [Prehistoric Rock Art Sites in the Côa Valley and Siega Verde](https://kokai.app/en/paises/europa/portugal/prehistoric-rock-art-sites-in-the-coa-valley-and-siega-verde/): paleolithic archaeological site in Portugal - [Berlengas](https://kokai.app/en/paises/europa/portugal/reserva-natural-de-las-berlengas/): archipelago in Portugal - [Alto Douro](https://kokai.app/en/paises/europa/portugal/alto-douro-wine-region/): UNESCO World Heritage Site - [Peneda-Gerês National Park](https://kokai.app/en/paises/europa/portugal/parque-nacional-de-peneda-gerez/): protected area in Portugal Every Portugal place under Nature, each with its season, is on [its page](https://kokai.app/en/paises/europa/portugal/naturaleza/). ## Frequently asked questions ### What is Gruta do Caldeirão? It is a cultural heritage monument in Tomar, Portugal. It has an article in one Wikipedia, so it is not one of the busiest places in Portugal: one to enjoy at a calmer pace. ### When is the best time to visit Gruta do Caldeirão? April to October. In June there are 14 h 47 of daylight, and in December, 9 h 13. ### How do you get to Gruta do Caldeirão? The nearest main airport is Lisbon Humberto Delgado Airport (LIS), 115 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=39.647013%2C-8.416208) opens the route on the map, and how to get around Portugal is explained in [its country guide](https://kokai.app/en/paises/europa/portugal/#moverse). ### How do I add it to my trip? With one tap. In Kokai it is already on the Portugal map, next to the places you save yourself: add it to a day's plan, give it a time and, if you like, get a reminder when you pass nearby. ### What else is around here? Nearby you have [Cervejaria do Fernando](https://kokai.app/en/paises/europa/portugal/cervejaria-do-fernando/), [Casa da Vera](https://kokai.app/en/paises/europa/portugal/casa-da-vera/), [Pegões Aqueduct](https://kokai.app/en/paises/europa/portugal/aqueduto-dos-pegoes/). The rest is in [the Portugal guide](https://kokai.app/en/paises/europa/portugal/). Data from [OpenStreetMap](https://www.openstreetmap.org/node/7930595820), licensed under the ODbL, and from [Wikidata](https://www.wikidata.org/wiki/Q66815000), CC0. Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).