The Bells Monument outside the city centre of Sofia was installed in 1979, when UNESCO declared it the International Year of the Child. The monument presents more than 70 bells from across the world, on pillars that are marked with a message from children from the respective nation. Occasionally, the seven main bells, one for each continent at the top of the central pillar, ring along to parades or events held around the monument.

Located just outside Kuala Lumpur's city centre, this six-tiered Chinese temple honours Mazu, the revered sea goddess. Since its opening in 1989, the active worship site has drawn visitors with its striking architectural features, from the grand prayer hall altars to the tiered roofs adorned with intricate carvings. The temple is open to tourists, but expect devotees filling the temple, burning incense offerings and praying. You can explore independently or join organised tours to appreciate this lesser-known gem's cultural and artistic significance.

The Ludwig Collection, boasting over 14,000 artworks, stands as one of the world's most significant art collections. Irene and Peter Ludwig have gathered more than 3,000 pieces by artists like Andy Warhol, Roy Lichtenstein and Jean Michel Basquiat under one roof. The collection also hosts special exhibitions that highlight the latest trends in contemporary art.