Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Known as the "Queen of Beach Markets," Calangute epitomizes Goa's beach flea market scene.

A bit of retro transportation flair preserved in the world's largest department store.

A sliver of nostalgia in Seattle's Viretta Park.

This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Centuries before the modern seismograph, Armenian monks measured quakes with this tilting pillar.

The world's longest nonstop reversible cable car soars through spectacular scenery to the medieval Tatev Monastery.

The capital of Cambodia is named after the hill on which this ancient temple complex stands.

One of the biggest markets in Asia, under one of the continent's largest domes.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

This preserved village shows the modest lifestyles of the area's 19th-century Chinese gold miners.

An industrial site turned into Hungary's most cherished natural wonder.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

At this rare mosque in Tbilisi, Sunni and Shia Muslims pray side by side.

Local legend says that whoever burns down this 2,000-year-old tree will only have seven days to live.

This striking icon of the disputed Republic of Artsakh caused a stir at a Eurovision Song Contest.