Dubí Hora is a modest, elongated hill in the České středohoří mountains that hides one of the region's most fascinating geological curiosities — the famous 'Konojedy loaves', columns of basalt-like rock stacked like bread loaves. This is a destination for those drawn to unusual rock formations rather than sweeping summit panoramas.

The massif stretches roughly two kilometers from northwest to southeast. It once had two summits, but the higher one, formerly reaching 463 m, has been gradually swallowed by an active quarry and stood at only 448 m as of 2025. The lower, northern summit reaches 446 m. The terrain is partly wooded, and the atmosphere here mixes raw industrial activity with quiet, protected nature — a striking contrast in every season.

On the northwestern slope, within the cadastral area of Konojedy, lies the tiny but remarkable Dubí Hora National Nature Monument, covering just 0.0896 ha — the wall of an old quarry displaying columns of analcime tephrite, curved into arches that resemble stacked loaves of bread.

How to reach the summit

• Konojedy — a field path leads to the national nature monument, unmarked trail, easy
• Neither the hill nor the protected area has any marked tourist trail

Practical information

• The nature monument is home to strongly endangered species, including the common European adder (Vipera berus), slow worm, and sand lizard
• Part of the former southern summit is still being quarried today, with the stone processed into cut and split paving slabs

The tephrite columns in the quarry wall reach up to eight meters in height, and their hook-like curvature — caused by the terrain over which the lava once flowed — is a phenomenon unique among Czech neovolcanic rocks.