Adam, Artillery fort in České Petrovice, Czech Republic.

Adam is an artillery fort whose eight planned reinforced-concrete casemates stand on a 400 × 500 m rectangle on the Adam hill in the Orlické Mountains. About 2 km of underground corridors link the entry object K-Am-S 43a "Na sekyře" with three infantry and four artillery casemates; walls and ceilings facing the enemy are 350 cm thick and armoured cupolas 30 cm.

Construction of the fort began on 10 August 1936 and continued until 30 September 1938, when the area was ceded to the Third Reich under the Munich Agreement. The design was drawn up by Petr Kovář and the casemates were built by Dr. ing. Kapsa a Müller of Prague to the highest, fourth resistance class, with 350 cm of concrete on the enemy side. The garrison of 611 men, including 34 officers, was to be the VI Battalion of the Hraničářská Regiment Nr. 19.

The bunkers carry letter-number codes: K for the Králíky sapper corps section, S for srub (casemate), numbered east to west, plus names taken from nearby features such as the Adam hill. The infantry casemates are K-Am-S 39 "Houdek", K-Am-S 40 "U háječku" and K-Am-S 41 "Pod vrškem".

Wear sturdy footwear as the grounds are uneven and can be muddy, especially after rain. Check access conditions beforehand, as the site may be subject to closures or seasonal restrictions.

The bunkers' letter-number codes follow a system: K marks the Králíky engineer section, S stands for srub (casemate), and numbering runs east to west. Most casemates also bear names taken from nearby features, such as the hill Adam itself.