Tlustá hora, Mountain summit near Zlin, Czech Republic

Tlustá hora is a 458 m summit above the southern part of Zlín, topped since 1965 by a Czech Radiocommunications transmitter. On its slope stands the shortened steel frame of the 1933 lookout tower nicknamed Maják, closed to the public, with concrete remnants of the former zoo cages among the trees.

In 1926 the Zlín branch of the Czech Tourist Club, with Tomáš Baťa among its founding members, proposed a shelter and lookout tower on the summit. Baťa's firm bought the Tlustá forest and former manorial land for the city in May 1927 for 900,000 koruna, and the foundation stone was laid on 1 May 1927. The welded steel tower, 45 m tall on a 36.5 m base and using 16 tonnes of iron, was completed in 1933.

The lookout tower, completed in 1933, was nicknamed Maják (Lighthouse) because a searchlight for aircraft orientation was mounted on it; the powerful reflector first lit Zlín on the eve of 1 May 1933. The tower was designed by engineer Vtelenský, whose welded steel structure used 16 tonnes of iron without rivets or bolts.

The summit is topped by a radio and TV tower built in 1965, and the shortened steel structure of the 1933 lookout tower still stands among the trees but is not open to the public. The site is above the southern part of Zlín, and the forest park is accessible on foot; no parking or trail markings are mentioned in the sources.

The lookout tower on the summit was nicknamed Maják (Lighthouse) because a powerful aircraft beacon was mounted on it; it first lit up Zlín on the eve of 1 May 1933. The beacon was switched off during the occupation so it would not guide Allied aircraft.