Complex sentence: The spring became very popular when gold was discovered in the De Kaap Valley (near Barberton), prospectors would visit there on weekends to get away from their strenuous work of digging for gold.
Split into simpler sentences: The spring became very popular when gold was discovered in the De Kaap Valley (near Barberton). Prospectors would visit there on weekends to get away from their strenuous work of digging for gold.