Where would you find a floating bullet train?

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In Japan. The first test run was done for a train, which uses magnetic levitation technology, or magnets to lift the train carriages, propelling it forward without wheels. In this test run, the train managed speeds of more than 311 miles per hour. This mode of transport is capable of cutting travel time from Tokyo to Nagoya by half.

These sleek, aerodynamic trains are the fastest ever manufactured, according to The Daily Mail. Japan is famous enough for its high-speed trains and had developed one such way back in 1964. Magnetic Levitation technology has managed speeds of over 361 miles per hour during a previous test run.
Official test runs for the train are scheduled to begin in September between Tokyo and Nagoya, which is Japan’s third largest city, by 2027. China was the first country to open a commercially-operated Maglev service with the Shanghai Maglev opening in early 2004. The Shanghai Maglev has a commercial operational speed of 268mph due to the short track length and it was completed at a cost of $1.3 billion to build.
Manufacturers of the Maglev technology also claim that it is less polluting than flights which work the same distance, adovacting the use of this technology for inter-city travel in developed countries in the future.