Poledník, Observation tower in Šumava Mountains, Czech Republic.

Mittagsberg is an observation tower in the Šumava Mountains offering views across the border region where Czech, German, and Austrian landscapes meet. The viewing platform allows visitors to see the terrain spanning these three countries on clear days.

A secret military facility codenamed TOPAS was built here in the 1960s and 1970s in the strictly guarded border zone, intercepting radio traffic deep inside West German territory. Military use ended in 1989 and the complex decayed; after a dispute between the Šumava National Park administration and the Czech Tourist Club, the buildings were demolished in 1997 and only the tower kept. It has been open to the public since 1998.

The name Poledník means "noon" in Czech, and the summit marks the point where the sun stands at midday. Visitors climb 227 steps to the top; the tower's three semicircular upper floors, visible from the meadow below, are the shape it kept from its military years.

Access to the viewing platform is via stairs during opening hours from April through October. Wear sturdy shoes as the route can be steep and mountain weather changes quickly.

The tower's upper half keeps its three semicircular floors, and since August 2009 a small photovoltaic plant on the tower has covered its electricity consumption. The site is the third-highest observation tower in Czechia, after Praděd and Boubín.