A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

A shopping mall housed in a historic cinema and hiding ancient ruins under its floors.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

This historic black and white monastery is one of Bulgaria's architectural jewels.

Sofia's legislative center is continuously reinventing itself.

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

A striking symbol of the Bulgarian capital.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

A futuristic, brutalist masterpiece that is also strangely prison-like.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

What began as an illegal art installation has become a symbol for unity, ocean awareness, and coastline preservation.

These unusual houses look like giant boats that washed ashore on a residential street.

A dramatic coastline that’s home to a rare pine tree.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

Go deep on these fascinating fish, and get a bonus lesson on the importance of marine conservation.

The world’s oldest active sailing ship.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

This massive monument was unveiled the day Kosovo declared independence from Serbia.