You can expect a country with a name that literally means “Low Country” to have a little height-envy. It’s probably to overcompensate for its low-lying nature that Netherlands erected the world’s tallest climbing wall, naming it Excalibur (they also bought a Porsche).
The climbing tower at the Bjoeks Climbing Center in Groningen is 121 feet (37 meters) tall and curves 36 feet (11 meters) out from the base (probably due to the loss of sensation from people climbing it all the time). It costs about €11 for a day ticket with additional charges for rental equipment. Climbing facilities are open until 11pm each day so you can climb to your little heart’s content.