The spectacular and eerie moss-covered grave site of 19th-century Belgian merchant.

The tomb of one of the greatest travelers in history.

The ruins in this village were caused by something more sinister than neglect.

Dine on superb local staples in a converted historic church.

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

Drink the 'Blood of Christ' in this Roman Catholic fever dream.

An undeciphered text is inscribed on a mysterious stone slab.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

The oldest building in Madrid.

One of the best examples of the modernist movement in Madrid.

Once a resting spot for King Fernando VII.

This modernist bridge highlights the bear as a symbol of Madrid.

This handsomely carved wooden church is more than 800 years old.

A temple to modernity, tucked away amid Barcelona's more well known museums.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

During World War II, the Nazis repurposed this beer cellar to store stolen artwork.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

Inside this church is an obscure piece of art carved by the famous Alice Liddell.

In Warrington’s Golden Square, it's always tea time.

A Jenga-style cylindrical tower of books that appears to go on forever.