Dorney Park also had a swimming pool from the early 1900s until 1963. Plarr was pressured by local business owners to shut down the swimming pool because of "mixed" swimming. Local business owners threatened to boycott the park and stop having their company picnics at the park if he did not shut it down. One side of the former pool had live seals and fish, while the other side was used for the Whale Boats, motorised boats seating two people each. Near the lower entrance to the park was the dark ride called Tunnel Of Love which later was rethemed as The Journey to the Center of the Earth. The ride was a Bill Tracy mill chute. It was a boat ride through a dark tunnel with scary scenes behind glass, and a lift and drop at the end. It was razed following the 1992 season, after Cedar Fair, LP acquired the park. Journey To The Center Of The Earth was located near the park's first roller coaster, which opened in 1923. It was simply known as the Coaster or "the yellow rollercoaster" until 1989 when it was renamed Thunderhawk. It still operates today.