Pilgrimage site for star-crossed lovers.

These pillars at the main entrance of this church are actually a hidden musical instrument.

According to a local legend, this bridge was constructed by an astrologer with the help of the devil.

Bacteria and algae give the salty water its bubblegum hue.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

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

The tallest tower in Cáceres's Old Town.

This supermarket offers shoppers a window into the past alongside their groceries.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

Northern Ireland's Brobdingnagian stepping stones.

These murals stand as reminders to the troubled history of this Northern Ireland city.

A museum dedicated to the tragedy of Bloody Sunday.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

Horse cemetery on the grounds of Blarney Castle.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

This sculpture honors the man who was known as the "Righteous Among the Nations."

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.