Eiffel Tower

The Eiffel Tower is wrought iron lattice tower on the champ de mars in Paris, France. It is named after the engineer Gustave Eiffel, whose company designed and built the tower. Locally nicknamed “la deme de fer”. It was constructed from 1887 to 1889, as the center piece of the 1889 worlds fair.

Taj-mahal

Taj-Mahal is an Islamic white-ivory marbel mousoleum on the right bank of the river yamuna in agra, uttar pradesh india. Construction of the mausoleum was essentially completed in 1643, but work continued on other phases of the project for another 10 years. The Taj Mahal complex is believed to have been completed in its entirety in 1653 at a cost estimated at the time to be around 32 million, which in 2023 would be approximately 35 billion.

The Sydney Opera

The Sydney Opera House is a multi-venue performing arts center in Sydney. Located on the foreshore of Sydney Harbor. it is widely regarded as one of the world’s most famous and distinctive buildings and a masterpiece of 20th-century architecture.

Designed by Danish architect Jorn Utzon, but completed by an Australian architectural team headed by Peter Hall, the building was formally opened by Queen Elizabeth II on 20 October 1973, after a gestation beginning with Utzon’s 1957 selection as winner of an international design competition.

Leaning Tower of Pisa

It is known for its nearly four-degree lean, the result of an unstable foundation. The height of the tower is 55.86 meters (183 feet 3 inches) from the ground on the low side and 56.67 m (185 ft 11 in) on the high side. The width of the walls at the base is 2.44 m (8 ft 0 in). Its weight is estimated at 14,500 tones (16,000 short tons).The tower has 296 or 294 steps; the seventh floor has two fewer steps on the north-facing staircase.