The Colosseum is the largest ancient amphitheater ever built.

The Garzweiler surface mine spans a large area across several German districts including Rhein-Kreis Neuss, Rhein-Erft District, Heinsberg, and Mönchengladbach.

Hambach surface mine is one of the largest human-made holes in Europe.

Lake Retba, also known as Lac Rose, is a unique body of water known for its striking pink color.

The Cottbuser Ostsee is set to become the largest artificial lake in Germany.

Velká Amerika, also known as the Czech Grand Canyon, is a picturesque, partially flooded limestone quarry located near Morina village, in the Central Bohemian Region of the Czech Republic.

The Steinbruch an der Schanz is a former quarry located in the German state of Bavaria.

Dinorwic Quarry is a large former slate quarry, now home to the Welsh National Slate Museum, located between Llanberis and Dinorwig in North Wales.