These post boxes from a bygone era have been the source of controversy and debate.

A pair of trees near a Hong Kong shrine are said to grant wishes, but only the ones they hold on to.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A natural swimming hole that was once a ceremonial center for Mayan priests.

This massive Maya archaeological site is home to the tallest man-made structure in Belize.

A massive underwater sinkhole made famous by Jacques Cousteau.

An imposing statue of the first prime minister of Antigua and Barbuda stands in the middle of a traffic intersection.

A series of magical limestone formations along the coastline of the country island of Antigua.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

The museum within the Kom-Ombo Temple complex houses mummified crocodiles and mummified crocodile eggs.

Art Nouveau beauty hidden deep in Cairo’s Al-Helmiya neighborhood.

Inside this 3,500-year-old tomb are remarkable ancient Egyptian paintings of African wildlife.

This fortress was built using the last surviving stones from the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.

This 7th-century monastery was sacked by Saladin.

The lost library of Alexandria, revived as a spearhead of cultural preservation.

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

The largest known Ancient Egyptian obelisk.

In Egypt's expanding metro area, many of the neighbors are dead.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

One of the most well-preserved temples of ancient Egypt.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

A 19th-century relic of timekeeping.

The Cape of Good Hope is not quite as low as you can go on the African continent, but it's still geographically significant.

The loneliest plant in the world resides at the Durban Botanic Gardens...mostly.