A scientific observatory managed the largest Portuguese astronomy research unit.

Marvel at this immense work of art that greets arrivals to the city.

This 18th-century water provider for Aranjuez was refurbished in 2013 only to be neglected again.

Dedicated to one of the author's most iconic works.

This "grandfather" eucalyptus is one of the tallest trees in Europe.

An Antoni Gaudí masterpiece in Astorga.

The only museum dedicated entirely to the dry stone walling technique.

These 400-year-old ruins are all that's left of the monastery where Ines de Castro was assassinated by the King of Portugal.

An abandoned 6th-century monastery features a medieval map of the known world.

Nicknamed "Karri Knight," this Eucalyptus was planted in 1895 and stands at 72 meters.

The ruins of the second-largest circus school in the world.

Designed by Gustave Eiffel before his famed tower.

This humble bench is considered the most beautiful in the world.

In addition to showing films, this one-screen arthouse cinema from the late 1940s is a museum of old film equipment.

Among the best preserved megalithic monuments in the Aragón river valley.

This sculpture of a rider on horseback once crowned the tomb of an Iberian aristocrat.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

Sample Spanish wines under frescoes in a historic monastery of "barefoot old men."

This Art Nouveau gate still stands at the former entrance of a 20th-century Spanish writer's colony.

This fountain was designed to honor the man who helped bring water to Barcelona.

On a trail in Portugal's Barão de São João National Forest, a pile of faces look up at hikers from the forest floor.

The remains of a convent turned military barrack in the heart of Madrid.

The world's largest sundial can cast a shadow more than 1,600 feet long.

This ancient fort has been a great insight into the Roman presence in the region.