The most difficult towers riddles

Leaning Tower of Suurhusen is the world's most leaning, beating the world-famous Leaning Tower of Pisa by 1.22°.

The White Tower of Thessaloniki is a monument and a museum on the waterfront of the city of Thessaloniki, the capital of the region of Macedonia in northern Greece. The present tower replaced an old Byzantine fortification, known to have been mentioned around the 12th century, that the Ottoman Empire reconstructed to fortify the city's harbour sometime after Sultan Murad II captured Thessaloniki in 1430.

The Santa Justa Lift connects the lower streets of the Baixa with the higher Carmo Square. Since its construction, the Lift has become a tourist attraction in Lisbon. Among the urban lifts in the city, Santa Justa is the only remaining vertical one.

Tokyo Skytree (pictured) reached its full height of 634.0 meters (2,080 ft) in March 2011, making it the tallest tower in the world, displacing the Canton Tower, and the second tallest structure in the world.

The Mouse Tower (Mäuseturm) is a stone tower on a small island in the Rhine, outside Bingen am Rhein, Germany. The Romans were the first to build a structure on this site. It later became part of Franconia, and it fell and had to be rebuilt many times. Hatto II, the Archbishop of Mainz, restored the tower in 968. The story of how it came to be called the "Mouse Tower" comes from a folk tale.

The Sky Tower in Auckland (pictured) is 328 meters or 1,076 ft tall. It has become an iconic structure in Auckland's skyline.

The Oriental Pearl Tower is a TV tower located in Shanghai. At 468 m high, it was the tallest structure in China from 1994–2007, when it was surpassed by the Shanghai World Financial Center.

The tower stands 320 meters (1,050 ft) tall, about the same height as an 81-storey building. Because of thermal expansion, the height varies by 15 cm (5.9 in) due to temperature.