The No. 9 Coal Mine & Museum offers a glimpse into Pennsylvania's coal mining history. Explore exhibits showcasing artifacts from over 200 years of mining operations in the Panther Valley, with a focus on the Mammoth Vein, a significant source of anthracite coal. Since 2002, visitors have had the opportunity to delve into the history of coal mining and experience the realities of toiling underground.

This art museum in The Hague is home to some of the most eminent paintings in the world including pieces from Monet and Picasso. Dutch abstract painter Piet Mondrian remains the featured artist at the museum with over 300 of his paintings displayed there. Walking through the halls of this remarkable Art Deco building is an eye-opening experience. The early 20th-century architecture fashioned by H.P. Berlage consisting of colourful brickwork, marble flooring and ornamental brass finishes is considered to be his masterpiece. The museum is open to the public and you can skip the queues by booking ahead of time on their website.

In 1996, American artist James Turrell designed the Celestial Vault to showcase the sky in all its glory using an innovative astronomical optical illusion. In the centre of this grassy artificial crater, there is a stone bench on which visitors can lie to observe the sky as a curved dome, emphasising the way light affects how we perceive things and inviting those willing to challenge their own perceptions.