Slovenské opálové bane is a visitor attraction in eastern Slovakia, offering access to a remarkable underground heritage site known for its opal deposits and rare minerals. The mines, described by the organization as the oldest opal mines in the world, closed after mining ended in 1922 and were reopened to visitors more than 90 years later. Today, guests can explore the historic workings on guided tours that bring the mines’ history, opal formation and mining traditions to life.

Experiences are presented for a range of visitors, including families, school groups and adventurers; options include a more demanding “free line” exploration through the underground passages. Tours may feature mining exhibits, replica equipment and opportunities to learn about the local environment, including the bats that shelter in the mines. Above ground, visitors can use the parking facilities and explore a new educational trail.

The site also offers souvenirs, including small opal jewelry and commemorative coins. Slovenské opálové bane promotes reservations through its website and hosts experiences such as company team-building events