One of the tallest buildings in Africa provides a great view of Johannesburg's unique geography.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

The world's largest pineapple building honors Bathurst's favorite fruit.

The location of this historic castle was inspired by a donkey.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

The castle still holds traces of the abandoned Roman fort it was built atop.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

Recently restored menagerie of Victorian-era beasts.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

This ancient Egyptian obelisk still bears the wounds of World War I.

The medieval woodcut-style artwork chronicles life in medieval London.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

Its collection includes a broad array of social, geographic, graphic design, and political history.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

An architectural oddity hides in plain sight on this iconic London bridge.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.