A volcanic crater that visitors can look inside.

In the Middle Ages, villagers would sound this stone trumpet to boost fertility and coax fish to shore.

The world's most remote airport.

You can swim in these highly salty, mesmerizingly blue lakes in the Atacama Desert.

This large round boulder is said to emit spiritual power, but it may just be magnets.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The largest stone moai on Rapa Nui.

Now in ruins, this castle stood for centuries and saw a number of gruesome events.

The largest terracotta fountain in the world, built to commemorate Britain’s Victorian achievements.

Glasgow's own "tipsy" temperance monument.

The former home of the world-famous Templeton Carpet Factory.

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

The old tradition of drying laundry on poles in the public green is still guaranteed by Glasgow city law.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A scattered trail of street art adds a pop of color to the city's stark structures.

This collection of lakeside pagodas and temples are flanked by giant lions, tigers, and dragons as well as their welcoming maws.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

A waterfall runs right through the middle of this Taiwanese shrine to the hundreds of workers killed while building a nearby highway.

Though dynamited and defaced, the statue still stands outside the law courts in Georgetown, Guyana.

The end appears to be nigh for the world's fourth-longest floating bridge.

A monument to Cuffy, a rebellious enslaved person who became a national hero in Guyana.

The largest market in Guyana, designed and built by the Edge Moor Iron Company of Delaware.

Georgetown’s most impressive building is also one of the tallest wooden churches in the world.