A lighthouse stay website that shows, before you book, which window will give you the sunset.
Latarnik is a made-up guesthouse in the working Mewia Kępa lighthouse on a cliff above the Baltic Sea: five rooms on successive floors of the tower and a room in the keeper’s house. Instead of drone photos, the website shows the lighthouse in cinematic 3D, at sunset and at night, with a beam that flashes in its real rhythm. Guests pick a night, and the site works out where the sun will set that day and which windows will show it. The chosen room opens in the tower like a drawer, and the booking ends with an entry in the keeper’s log.
This is a concept project. Latarnik is a made-up business, but the website really works: you can click through it on desktop, tablet and phone. The forms do not send data anywhere. It was designed for a Polish business; here you see its English version.
In photos every room looks alike: a bed and a window. Guests cannot tell how a first-floor room differs from the one under the lantern, or what they will see from the window.
A 3D lighthouse with baked, film-like lighting. The chosen room opens in the tower like a drawer: the floors above it lift, the near half of the wall disappears in a cutaway, and inside you see the bed, a seat in the window niche and lamps that are switched on. One button sits the camera by the window, looking where the sun will set.
Guests choose a room by its view and height, not its number, and know what they pay extra for.
The most common question before booking is whether the room will have a sunset view. The answer depends on the season, because the sun sets over the forest at one time of year and over the sea at another.
The site calculates the sun’s position for the chosen night and the lighthouse’s coordinates: the time and azimuth of the sunset, the next sunrise, and whether the sun will fit in each room’s window. The register marks it with a sun sign, the room plan draws the direction of the sunset, and the 3D sky turns to the azimuth of the chosen day.
Guests book a night with the sunset in their window, and the guesthouse no longer answers that question over the phone.
Seaside accommodation websites all look the same: a drone shot, navy and gold, and a grid of cards with amenity icons. The guesthouse gets lost among its neighbors.
The site is the lighthouse’s entry in the List of Lights, opened as a booking register: the number, the position, the Fl(2) W 15s characteristic with a flash bar synced to the 3D beam, the window heights above the sea and the horizon range from each of them.
From the first screen it is clear this is a real, working lighthouse, not just another guesthouse with a view.
Booking by email drags on for days, and guests do not know which nights are free or what a weekend will cost.
Date, number of nights and guests on the first screen. The register answers right away: free or taken, the price per night, too small for that many people, and it recommends the best free room with the sunset in the window. Booking takes three fields and ends with an entry in the keeper’s log with that night’s sunset time. At night in 3D, the windows of booked rooms are lit.
A night is booked in a minute, and guests know right away what to expect.
You pick a room from the register or point at a floor on the tower. The floors above it lift one after another, the near half of the wall disappears in a cutaway, and the camera stops by the room. You can rotate the view, and the cutaway follows the camera.
The “Sit by the window” button moves the camera into the room, and the drawer closes around it. If the sun fits in the window, the camera looks at the sunset azimuth of the chosen day, and the caption says what time it will set.
After dark the whole scene turns to night: the lantern lights up, the beam turns in the Fl(2) W 15s rhythm, and the windows glow where someone is sleeping that night. The characteristic bar in the register flashes together with the beam.
The room console shows four views at once. The plan is drawn from the same geometry as the 3D model and shows the window’s field of view and the sunset direction on the chosen night.
Google Lighthouse test of the project’s home page, October 2026. The home page weighs 211 KB including photos and fonts. The score can vary by a few points with every test. Check it yourself in PageSpeed Insights
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