# Grund Lock, Luxembourg: what it is and when to go > Grund Lock is a part of the Luxembourg Fortress (Luxembourg City). Interests: History. The best time to visit is April to October. In June there are 16 h 03 of daylight, and in December, 7 h 56. It has an article in one Wikipedia, so it is not one of the busiest places in Luxembourg: 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/luxemburgo/ecluse-du-grund/ - Reviewed on: 2026-10-02 - Language: en ## In a nutshell - **What it is:** Part of the Luxembourg Fortress · History - **Where:** Luxembourg - **Best time:** April to October. - **Nearest airport:** LUX Luxembourg, 5.8 km as the crow flies - **Coordinates:** 49.60778, 6.13681 ## What it is and where Grund Lock is a part of the Luxembourg Fortress (Luxembourg City). It has an article in one Wikipedia, so it is not one of the busiest places in Luxembourg: one to enjoy at a calmer pace. It is in [Luxembourg City](https://kokai.app/en/paises/europa/luxemburgo/luxemburgo/), where this site lists 140 more places to see, 657 m from the centre. Its coordinates are 49.60778, 6.13681; the nearest main airport is Luxembourg-Findel International Airport (LUX, Luxembourg), 5.8 km as the crow flies. How to get around Luxembourg (train, car, bus) is covered in [its country guide](https://kokai.app/en/paises/europa/luxemburgo/#moverse). - [Where it is](https://www.google.com/maps/search/?api=1&query=49.607783%2C6.136815) - [Directions](https://www.google.com/maps/dir/?api=1&destination=49.607783%2C6.136815) It is one of the [History](https://kokai.app/en/paises/europa/luxemburgo/historia/) places in Luxembourg. 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 Grund Lock is **April to October**. | Mes | Época | Hours of daylight | | --- | --- | --- | | January | Possible | 8 h 22 | | February | Possible | 9 h 51 | | March | Possible | 11 h 33 | | April | Best time | 13 h 30 | | May | Best time | 15 h 08 | | June | Best time | 16 h 03 | | July | Best time | 15 h 41 | | August | Best time | 14 h 14 | | September | Best time | 12 h 21 | | October | Best time | 10 h 28 | | November | Possible | 8 h 47 | | December | Possible | 7 h 56 | In June there are 16 h 03 of daylight, and in December, 7 h 56. 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 Luxembourg in general, with its festivals and peak seasons, is in [its country guide](https://kokai.app/en/paises/europa/luxemburgo/#cuando-ir). ## Before you go to Luxembourg To enter Luxembourg there are 5 things to sort out before you leave, starting with “Valid Spanish ID card (DNI) or passport”: they are all, with their deadlines, in [the Luxembourg checklist](https://kokai.app/en/paises/europa/luxemburgo/#antes-de-salir). Currency: Euro (EUR); plugs: Type C and F · 230 V · 50 Hz (the same plug as in Spain); emergencies: 112 · 113 police. 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 - [Pulvermuhl Viaduct](https://kokai.app/en/paises/europa/luxemburgo/viaduc-pulvermuhle/): Two-track railway viaduct in Pulvermuhl, eastern Luxembourg City · 180 m - [National Museum of Natural History, Luxembourg](https://kokai.app/en/paises/europa/luxemburgo/musee-national-d-histoire-naturelle/): Natural history museum in Luxembourg City, Luxembourg · 231 m - [Fortress of Luxembourg](https://kokai.app/en/paises/europa/luxemburgo/luxembourg-city-old-quarters-fortifications/): Fortifications in and around Luxembourg City, Luxembourg, largely dismantled in 1867 · 246 m - [Chapelle Quirin Luxembourg](https://kokai.app/en/paises/europa/luxemburgo/chapelle-saint-quirin/): History · Temples · 266 m - [Passerelle](https://kokai.app/en/paises/europa/luxemburgo/pont-viaduc/): Viaduct in Luxembourg · 314 m Distances are as the crow flies. Everything else is in [the Luxembourg guide](https://kokai.app/en/paises/europa/luxemburgo/). ## More in Luxembourg: History - [Berg Castle](https://kokai.app/en/paises/europa/luxemburgo/chateau-de-berg/): principal residence of the Grand Duke of Luxembourg - [Fort Thüngen](https://kokai.app/en/paises/europa/luxemburgo/fort-thungen/): fort within the larger Luxembourg Fortess - [Grand Ducal Palace, Luxembourg](https://kokai.app/en/paises/europa/luxemburgo/grand-ducal-palace/): official residence of the Grand Duke of Luxembourg - [Vianden Castle](https://kokai.app/en/paises/europa/luxemburgo/chateau-de-vianden/): castle in Luxembourg - [Fischbach Castle](https://kokai.app/en/paises/europa/luxemburgo/fischbach-castle/): castle in Luxembourg - [Gëlle Fra](https://kokai.app/en/paises/europa/luxemburgo/gelle-fra/): historic site in Luxembourg Every Luxembourg place under History, each with its season, is on [its page](https://kokai.app/en/paises/europa/luxemburgo/historia/). ## Frequently asked questions ### What is Grund Lock? It is a part of the Luxembourg Fortress. It has an article in one Wikipedia, so it is not one of the busiest places in Luxembourg: one to enjoy at a calmer pace. ### When is the best time to visit Grund Lock? April to October. In June there are 16 h 03 of daylight, and in December, 7 h 56. ### How do you get to Grund Lock? The nearest main airport is Luxembourg-Findel International Airport (LUX), 5.8 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=49.607783%2C6.136815) opens the route on the map, and how to get around Luxembourg is explained in [its country guide](https://kokai.app/en/paises/europa/luxemburgo/#moverse). ### How do I add it to my trip? With one tap. In Kokai it is already on the Luxembourg 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 [Pulvermuhl Viaduct](https://kokai.app/en/paises/europa/luxemburgo/viaduc-pulvermuhle/), [National Museum of Natural History, Luxembourg](https://kokai.app/en/paises/europa/luxemburgo/musee-national-d-histoire-naturelle/), [Fortress of Luxembourg](https://kokai.app/en/paises/europa/luxemburgo/luxembourg-city-old-quarters-fortifications/). The rest is in [the Luxembourg guide](https://kokai.app/en/paises/europa/luxemburgo/). Data from [OpenStreetMap](https://www.openstreetmap.org/relation/20986707), licensed under the ODbL, and from [Wikidata](https://www.wikidata.org/wiki/Q16763637), CC0. Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).