Royalty

This innocuous-looking button may have been used to assassinate a king.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

The palace for King Gustav III was never completed, but the foundation remains tucked away in this city park.

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.

According to tradition, King Phillip II supervised construction of the seat of his empire from this seat carved into rock.

The most important and best preserved remnant of West Africa's powerful Songhai Empire.

This giant sculpture is both loved and disliked by the local community.

These mountain hot springs have seen power struggles, doomed romances, and a generalissimo's attempted escape from mutiny.

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

This Gothic church houses ornate royal tombs and a magnificent gilded altarpiece.

Once where royalty entertained guests, this opulent table is now one of the longest in the world.

This ordinary-looking mailbox has a rather explosive history.

A hidden plaque is the only reminder of the lost palace where two storied English kings were born.

This stone throne invites adventurers to observe breathtaking views of the Peak District.

At this sweet shop, the descendants of a royal chef serve up the fudge-like dessert his ancestor invented for a king.