This castle has links to Portugal’s founding and struggles for independence.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

This enormous censer uses a pulley system installed over 400 years ago.

This small, lush island has a long and bloody history.

The second oldest surviving house in Athens was owned by an Irish General.

Visit the birthplace of Charles Lutwidge Dodgson, better known as Lewis Carroll, poet and author of 'Alice's Adventures in Wonderland.'

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

Some believe that the stone once used to coronate Scottish kings resides inside this bar.

This museum offers a glimpse into early 20th-century Glasgow life.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

Discovered in a peat bog, these horned helms come from a thousand years before the Viking Age.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

One of the oldest cemeteries in Germany was originally used for victims of a cholera epidemic.

A brush maker used his factory to protect blind Jews from the Gestapo.

Art and a pun, all in one.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

The 1920s child prodigy author was last seen here at her Brookline home before vanishing at age 25.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

A remarkable cabinet of curiosities in an art space in the center of Berlin.