Tourists visit Swarovski Kristallwelten (Swarovski Crystal Worlds) in Wattens, Austria, Aug 26, 2019. Run by crystal producer Swarovski, the crystal-themed museum is one of the most popular tourist spots in Austria. (Photo: Xinhua)

Visitors look around Swarovski Kristallwelten (Swarovski Crystal Worlds) in Wattens, Austria, Aug 26, 2019.

A carousel horse seems to leap in the air at Swarovski Kristallwelten (Swarovski Crystal Worlds) in Wattens, Austria, Aug 26, 2019.

A light inside a crystal ball casts red-orange geometric shadows on the ceiling and walls in a room at Swarovski Kristallwelten (Swarovski Crystal Worlds) in Wattens, Austria, Aug 26, 2019.

Dozens of smaller images are reflected in the triangles of glass in a display at Swarovski Kristallwelten (Swarovski Crystal Worlds) in Wattens, Austria, Aug 26, 2019.

Water cascades out of the mouth of a human head created on the side of a hill at Swarovski Kristallwelten (Swarovski Crystal Worlds) in Wattens, Austria, Aug 26, 2019.