A model poses with a motorcycle and a car on a racing track at the Essen Motor Show in Essen, Germany, November 27, 2015. (Photo by Ina Fassbender/Reuters)

“Tiger and Turtle–Magic Mountain” by German art duo Heike Mutter and Ulrich Genth is a walkable sculpture shaped like a roller coaster. Visitors can stroll along the track (except for the loop sections). The 69 foot tall sculpture is located in Wanheim Duisburg, Germany.

J. Schwartz (C) and Marianne Wittelsberger (2nd R) of Consumer Watchdog dress as members of the “Google Track Team” in a hallway of the Dirksen Senate Office Building prior to a hearing on Google September 21, 2011 on Capitol Hill in Washington, DC. Members of Consumer Watchdog attended the antitrust hearing dressed as the “Google Track Team” in white tracksuits emblazoned with Google's motto, “Don't be evil”, wearing “Wi-Spy” glasses and pretending to track unsuspecting people during the event. (Photo by Alex Wong/Getty Images)

This photo taken on October 20, 2018 shows tourists posing for a photo on a middle of a railway track passing through an old residential district in central Hanoi. (Photo by Nhac Nguyen/AFP Photo)

Actor Sophie poses on September 5, 2022 in various locations in character at the Goodwood Race Track ahead of next week Goodwood's Revival meeting (16-18 September). (Photo by Peter Tarry/The Times)

People watch a competitor riding a homemade vehicle without an engine on a 300-metre-track during the Red Bull Soapbox Race in Amman, Jordan September 4, 2015. (Photo by Muhammad Hamed/Reuters)

Workers lay railway track in a tunnel of the Crossrail project in Stepney, east London, Britain, November 16, 2016. Crossrail, which is Europe's largest construction project, is a railway link which will connect outlying areas to the east and west of London with tunnels under the centre of the capital. (Photo by Stefan Wermuth/Reuters)

Competitors ride a home-made vehicle without an engine on a downhill track in the Red Bull Soapbox Race in Santiago, Chile, November 27, 2016. (Photo by Jonathan Faus/Reuters)