The oldest surviving presidential residence in the United States.

This large, circular tomb is the final resting place of the first emperor of Rome.

It's believed Matilda Fitzwalter's life was the basis for the famed literary figure.

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

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

A library where thousands of books explain how to avoid another Great Recession.

An unassuming churchyard is the resting place of a pioneering surveyor and reluctant namesake of a mountain.

A striped 12th-century basilica sits in the countryside of Sardinia.

This rare and ancient Christian relic is one of Ireland’s oldest freestanding stone crosses.

One man's extraordinary topiary garden in a small South Carolina town.

The legacies of two historic Black American institutions live on in this unassuming brick building.

This modern labyrinth lies in the shadow of a ruined medieval castle.

The healing properties of this well attracted royals and commoners throughout the Middle Ages.

This astronomical clock is the second oldest in England.

This hidden 13th-century tavern room has a few Shakespearean connections.

The oldest residential street in Europe also features an optical illusion.

Eyam took steps to quarantine themselves and keep the plague from spreading.

This wooden chair dates possibly back to the 15th century, and commemorates a local legend.

Order “Proletariat’s Cutlet” at this communist-themed restaurant allegedly once visited by Lenin.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

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

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.