18 April 2018, Hannover, Germany: The word "Mexico" is on the exhibition grounds in Hanover. Mexico is partner country of Hannover Messe this year. The Hanover Fair will be held from April 23 to 27 under the motto "Connect & Collaborate" together with the CeMAT logistics trade fair. Photo: Ole Spata/dpa

VIENNA, AUSTRIA - APRIL 18: A couple make their way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: A woman makes her way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: A general view of the round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: A woman makes her way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: A woman makes her way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: A woman makes her way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: Women make their way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: A general view of the round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: A man makes his way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: Women make their way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency

VIENNA, AUSTRIA - APRIL 18: Women make their way through a round labyrinth, part of the outdoor exhibition Sharing Heritage: Labyrinths in Europe at Schwarzenbergplatz, Vienna, Austria on April 18, 2018. The outdoor exhibition consists of a round labyrinth with five passages with a diameter of 33 m, made of 400 native ornamental and useful plants: lilac, viburnum, hazelnut, prawn cape among others. Together with the labyrinth, two columns show 50 different labyrinths of European cultural history, from historical mosaics to contemporary art. As labyrinths are one of the cultural treasures of humanity, Sharing Heritage: Labyrinths in Europe was organized for the European Heritage Year 2018. Omar Marques / Anadolu Agency