Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

This tiny island is home to the world's largest colony of Northern gannets.

These engineering masterpieces are a dominant feature of the Belfast skyline.

These murals stand as reminders to the troubled history of this Northern Ireland city.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

The last Victorian market in Belfast.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Experience a charming 1930's version of "infotainment."

An eatery for UFO seekers on the Extraterrestrial Highway.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Elevated freight railway turned wildly successful urban park.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A giant scrawl on the skyline of south London.

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

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

A wonderfully eccentric Victorian-era museum and library.

A sculpture of a famous ape who was once a beloved household name in London.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.