The busy transport hub is home to the tallest airport slide in the world.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Singapore's landscaping project is home to 18 incredible Supertrees.

Cartoon clouds and nature-inspired murals have transformed the streets of Kuala Lumpur.

A well kept and well documented look at the Bruneian Sultan's life and successes.

A symbol of Islam in oil-rich Brunei.

A dozen cast iron leopards stand guard along the length of Aberdeen's Union Bridge.

This Western Australian mint was established during the height of the Australian gold rush.

Hundreds of people walk past this palm tree every day without spotting its secret.

Skyscraper powered by wind turbines attached between its towers.

Kuwait City's uniquely designed water towers look straight out of a retro sci-fi cityscape.

Cozy basement bar sports an inventory of over 2,000 beers.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

2300-year-old Roman road connecting the empire.

One of the most photographed locations in the entire city.

An abandoned Byzantine fortress and notorious prison.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

Sofia's legislative center is continuously reinventing itself.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.