A tourist takes pictures of the Jacarandas trees at Alfama neighborhood in Lisbon on May 20, 2024. Every spring, the streets of Lisbon are covered in vibrant mauve and blue tones. The image of jacarandas in flower, an exotic tree introduced in the 19th century, has since become one of the postcards of the Portuguese capital. (Photo by PATRICIA DE MELO MOREIRA / AFP) (Photo by PATRICIA DE MELO MOREIRA/AFP via Getty Images)

A woman looks at the Jacarandas trees at Alfama neighborhood in Lisbon on May 20, 2024. Every spring, the streets of Lisbon are covered in vibrant mauve and blue tones. The image of jacarandas in flower, an exotic tree introduced in the 19th century, has since become one of the postcards of the Portuguese capital. (Photo by PATRICIA DE MELO MOREIRA / AFP) (Photo by PATRICIA DE MELO MOREIRA/AFP via Getty Images)

A couple of tourists sit on a bench under the Jacarandas trees at Alfama neighborhood in Lisbon on May 20, 2024. Every spring, the streets of Lisbon are covered in vibrant mauve and blue tones. The image of jacarandas in flower, an exotic tree introduced in the 19th century, has since become one of the postcards of the Portuguese capital. (Photo by PATRICIA DE MELO MOREIRA / AFP) (Photo by PATRICIA DE MELO MOREIRA/AFP via Getty Images)

A man crosses a street under the Jacarandas trees in Lisbon on May 20, 2024. Every spring, the streets of Lisbon are covered in vibrant mauve and blue tones. The image of jacarandas in flower, an exotic tree introduced in the 19th century, has since become one of the postcards of the Portuguese capital. (Photo by PATRICIA DE MELO MOREIRA / AFP) (Photo by PATRICIA DE MELO MOREIRA/AFP via Getty Images)

Tourists take pictures under the Jacarandas trees at Alfama neighborhood in Lisbon on May 20, 2024. Every spring, the streets of Lisbon are covered in vibrant mauve and blue tones. The image of jacarandas in flower, an exotic tree introduced in the 19th century, has since become one of the postcards of the Portuguese capital. (Photo by PATRICIA DE MELO MOREIRA / AFP) (Photo by PATRICIA DE MELO MOREIRA/AFP via Getty Images)

A couple of tourists sit on a bench under the Jacarandas trees at Alfama neighborhood in Lisbon on May 20, 2024. Every spring, the streets of Lisbon are covered in vibrant mauve and blue tones. The image of jacarandas in flower, an exotic tree introduced in the 19th century, has since become one of the postcards of the Portuguese capital. (Photo by PATRICIA DE MELO MOREIRA / AFP) (Photo by PATRICIA DE MELO MOREIRA/AFP via Getty Images)

A couple of tourists sit on a bench under the Jacarandas trees at Alfama neighborhood in Lisbon on May 20, 2024. Every spring, the streets of Lisbon are covered in vibrant mauve and blue tones. The image of jacarandas in flower, an exotic tree introduced in the 19th century, has since become one of the postcards of the Portuguese capital. (Photo by PATRICIA DE MELO MOREIRA / AFP) (Photo by PATRICIA DE MELO MOREIRA/AFP via Getty Images)

A man sits on a bench with his dog under the Jacarandas trees at Alfama neighborhood in Lisbon on May 20, 2024. Every spring, the streets of Lisbon are covered in vibrant mauve and blue tones. The image of jacarandas in flower, an exotic tree introduced in the 19th century, has since become one of the postcards of the Portuguese capital. (Photo by PATRICIA DE MELO MOREIRA / AFP) (Photo by PATRICIA DE MELO MOREIRA/AFP via Getty Images)