Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This bright yellow bridge is a true engineering feat.

This iconic hilltop church doubled as a lighthouse in the 19th century, guiding ships into the port of Valparaíso.

Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

A beautiful deserted greenhouse in the middle of a park.

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

A long-buried ancient ruin unearthed right in the middle of the city.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.