These imposing walls and towers look more like the ruins of a fortress than a monastery.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

It's always game time at Stockholm's only museum devoted solely to video games.

This unique sculptural clock transforms into a periscope every hour.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A sharp sculpture made of thousands of pieces of jagged glass.

One of two giant blue cockerel statues erected with an intentional double meaning.

A 246-foot-high revolving restaurant rises unexpectedly from a forested Finnish hilltop.

This temple located on a vertical drop of a rocky mountain houses relics from the Song Dynasty.

A charming Spanish village sits atop this natural limestone overpass.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

What was meant as an innocent piece of art has earned a reputation as the "mansplaining sculpture."

Because sometimes you need to make a batch of frites even when the stores are all closed.

This remarkable museum sprung from one of the most important prehistoric archaeological sites in the world.

A replica of the decorated wooden pillars Viking sailors threw overboard when finding new places to establish a settlement.

England’s ancient oak tree has such an impressive girth, people have been hosting parties within the hollow trunk for centuries.

It was once nicknamed "the most bombed hotel in Europe."

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

The graveyard holds the remains of Irish immigrants who arrived in Queens after fleeing the Great Famine.