Mercer Healing Springs was a popular health resort located between Princeton and Athens (Mercer County) and known for its special spring water. The spring was discovered around the 1870s or 1880s. People believed the water had medicinal powers.

The spring wasn't developed for tourists until around 1900. In 1911, a massive four-story hotel—with 65 rooms, a ballroom, and large porches—was built. The resort was very popular for summer fun until 1922, when a massive fire completely destroyed the hotel, ending the resort's business forever.