Mlaka Lighthouse

Mlaka Lighthouse stands close to the heart of Rijeka, Croatia, and its story is less about staying in one place than about repeatedly moving along the Kvarner Gulf shoreline.

Where did the lighthouse originally stand?

The first iron structure went up in 1884 at the tip of Rijeka's harbor breakwater, then known as the Maria Theresa breakwater. The ground beneath the breakwater began to subside, threatening the stability of the light, so toward the end of the 19th century engineers relocated it to firmer ground at Mlaka — the site that gave the lighthouse its current name. That relocation is why locals still refer to it, half-jokingly, as the "walking lighthouse."

Why has it moved so many times?

The shift to Mlaka wasn't the final one. In 1933 the structure was rebuilt for a third time: a sturdy, reinforced-concrete building went up, topped with a tall octagonal stone tower. The building itself covers a basement, ground floor and three upper floors, roughly 720 square meters in total. The most recent change came in 2002, when an extra floor was added to house a coastal radio station, giving the building a dual role — guiding ships visually and keeping them in radio contact.

How does the light itself work?

The optical apparatus uses eight lenses and completes a full rotation every two minutes, sending out an alternating red and white flash every 15 seconds. The signal carries roughly 33 kilometers, or close to 18 nautical miles, out to sea. The station runs fully automated today, with no permanent keeper on site — everything is monitored remotely.

Can you actually see it from the water?

That's a common question among sailors approaching Rijeka's port, and the honest answer is: less easily than before. The city has grown up around Mlaka, and modern buildings plus urban lighting now make the lighthouse harder to pick out against the waterfront skyline. Even so, it remains an active piece of maritime infrastructure, still doing the job it was built for — steering vessels safely into port.

What should visitors expect on site?

Unlike an isolated tower on a remote cape, Mlaka Lighthouse sits fully integrated into Rijeka's urban fabric, which makes it an unusual but rewarding stop for anyone interested in maritime history or industrial-era architecture. It's a compact reminder of how 19th- and 20th-century engineering shaped the coastal cities of Croatia, and it pairs well with a walk along Rijeka's waterfront promenade.

Frequently asked questions

When was Mlaka Lighthouse built? The original structure dates to 1884, installed on Rijeka's harbor breakwater; the building seen today took shape after a 1933 reconstruction.

Why is it called the "walking lighthouse"? Because over several decades it was relocated three times — first from the Maria Theresa breakwater to Mlaka, then rebuilt on reinforced foundations at the same site.

What does the light signal look like? An eight-lens optical apparatus rotates every two minutes, producing an alternating white and red flash every 15 seconds, visible from about 33 kilometers away.

Is the interior open to visitors? No — the lighthouse is an active navigation and radio-communication facility, so access is restricted. It's best appreciated from outside while strolling along Rijeka's waterfront.