Question: Where is the amusement park, in which Polka Marina is a merry-go-round, located?
Context: Willow Grove Park was an amusement park located in Willow Grove, Pennsylvania (the part which is in Abington Township), United States, that operated for eighty years from 1896 until the 1975 season.  It was generally an alternative to the Woodside Amusement Park in Fairmount Park until its closure.  The park operated under the name "Six Gun Territory" from 1972.  After closure, announced in April 1976, the park sat vacant until the land was cleared for a large shopping mall known as Willow Grove Park Mall, which opened in August 1982.  The mall pays homage to its predecessor by displaying banners and other objects which hark back to the land's days as an amusement park; a merry-go-round built and installed in 2001 operates within the mall. A family entertainment center (or centre), often abbreviated FEC in the entertainment industry, (also known as indoor amusement park or indoor theme park) is a small amusement park marketed towards families with small children to teenagers, and often entirely indoors or associated with a larger operation such as a theme park.  They usually cater to "sub-regional markets of larger metropolitan areas."  FECs are generally small compared to full-scale amusement parks, with fewer attractions, a lower per-person per-hour cost to consumers than a traditional amusement park, and not usually major tourist attractions, but sustained by an area customer base.  Many are locally owned and operated, although there are a number of chains and franchises in the field.  FECs are sometimes called family amusement centers, play zones, family fun centers, or simply fun centers.  Some non-traditional FECs, called urban entertainment centers (UECs), with more customized and branded attractions and retail outlets, are associated with major entertainment companies and may be tourist destinations.  Others, sometimes operated by Non-Profit organizations as Children's Museums or Science Centers, tend to be geared toward edutainment experiences rather than simply amusement.  FECs may also be adjuncts to full-scale amusement parks. LeSourdsville Lake Amusement Park was an amusement park located in Middletown, Ohio.  Opening in 1922 as a family picnic and campground, LeSourdsville Lake transformed in the 1940s to an amusement park with rides, attractions, and an arcade.  In 1977, the name was changed to Americana Amusement Park.  Following an electrical fire in 1990 that caused over $5 million in damages, the park fell into decline and was eventually closed in 1999.  Under new ownership, the park briefly opened again in 2002 returning to the name "LeSourdsville Lake Amusement Park", but after failed attempts to turn a profit and the operating company going bankrupt, it closed permanently near the end of the 2002 season.  The park's remaining rides and attractions were either demolished or sold, or still sit today. White City (also known as White City Amusement Park) was an amusement park in Indianapolis, Indiana's Broad Ripple Park that was in operation from May 26, 1906 until June 26, 1908.  The trolley park was constructed and owned by the Broad Ripple Transit Company.  Similar to nearby rivals Riverside Amusement Park and Wonderland, White City was inspired by an exhibit in the 1893 World's Columbian Exposition in Chicago.  Although the park's grand opening was immensely successful, White City's existence was the briefest of the three, having been open for two and one-half seasons before burning to the ground.  Throughout the park's existence, advertisements touted White City as "the amusement park that satisfied." Gaslight Village was a Vaudeville themed amusement park in Lake George, New York.  The park was located along New York State Route 9N, U.S. Route 9 and Warren County Route 69 (West Brook Road) in the village.  It opened in 1959, designed by Arto Monaco and built by amusement park builder Charles Wood.  The park was approximately 3-4 city blocks in size, and featured some standard amusement rides, (a Ferris wheel, merry-go-round, bumper cars, Tilt a Whirl, etc.) as well as some unusual rides.  The main feature of the park was the Opera House where Vaudeville-style shows, including an Ice Show, Meller-Dramas, and a wide variety of stage acts performed all day and until lights-out each evening.  The park was closed in 1989.  Its site later became the now defunct Lake George Action Park. Efteling (] ) is a fantasy-themed amusement park in Kaatsheuvel in the Netherlands.  The attractions are based on elements from ancient myths and legends, fairy tales, fables, and folklore. Wonderland City was an amusement park located at Tamarama, on Wonderland Avenue near the point at which it joins Fletcher Street, in Sydney, Australia.  It opened on Saturday, 1 December 1906 and closed in 1911.  At the time it was the largest open air amusement park in the southern hemisphere.  The 20 acre amusement park was operated by theatrical entrepreneur William Anderson.  During its operation the colossal playground had a balloon could go up to about 3,800 feet (1158.24 meters) high.  An enormous switchback railway and around the clifftop, a steam-driven miniature railway operated over about two miles (3.218688 km) of track.  A large wooden bridge build over an artificial lake, the Alpine Slide would take you to "Rivers of the World", Seal Pond.  An open air Roller Skating Ring, American Shooting Gallery.  It was operated by electric light powered by its own steam plant, and the whole area was covered with thousands of gaily coloured lamps and described as a Fairy City.  The first Surf "Gymkhana" Carnivals was held at Wonderland City (Tamarama Beach) organised by Bondi SBLSC on Saturday 11 February 1908.  was dogged by controversy for its attempts using high barbed-wire fence blocked access completely to local swimmers from Tamarama Beach.  Before being occupied by the amusement park, Tamarama Park was the site of The Royal Aquarium and Pleasure Grounds, commonly called the Bondi Aquarium. Polka Marina is a Merry-go-round in amusement park Efteling in the Netherlands.  It started operating in 1984. The Parque Diversiones Dr. Roberto Ortiz Brenes (English: National Amusement Park Dr. Roberto Ortiz Brenes ; also known as Parque Diversiones) is an amusement park located in San José, Costa Rica.  The park's motto is "healthy children helping healing children".  The park was named for Dr. Brenes because it was his proposal which resulted in it being established.  His idea was that the profits from the amusement park would assist to support the National Children's Hospital "Dr. Carlos Saénz Herrera", which was established in 1964.  The National Amusement Park began operating at the end of 1981. Shishu Park (Bengali: ঢাকা শিশু পার্ক ) is the only public sector children's amusement park in Shahbag, Dhaka, Bangladesh.  Established in 1979 on 15 acre of land, it is the first children's amusement park in Bangladesh.  Established as a profit making venture by Bangladesh Parjatan Corporation, the government-owned tourism promotion agency in Bangladesh, it is maintained by Dhaka City Corporation as its only entertainment park since 1983.  The 12 rides of the park include including a wheel train, a merry-go-round and a number of wheel-based rides.  Bangladesh Air Force donated a fighter jet in 1992.  The cheapest of all entertainment parks in Dhaka, charging BDT 8.00 for entry and 6.00 for each ride, it draws about 6,000 visitors a day.  During the Eid-ul-Fitr holidays the number of visitors reach up to 350 thousands.  The City Corporation earns about BDT 200 million annually from the park.  The park is open Monday through Thursday and Saturday from 2:00 pm to 7:00 pm.  On Fridays, it is open from 2:30 pm to 7:30 pm.
Answer: Kaatsheuvel in the Netherlands