Stunning ruins of what was once the center of one of the greatest empires in East Africa.

Human ancestor’s 3.6 million year-old footprints.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

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

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

Years of archaeology, just chillin' by the water cooler.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

An ancient Viking village in North America that predates Columbus by 500 years.

The unbelievably opulent home built for an infamous newspaperman.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

This modern monument to pagan belief looks like it was transported straight from ancient times.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Twelve hundred stone carvings guard this off-the-beaten-path Buddhist temple.

Climb right into the heart of this colorful Iceland volcano.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

A striking 12th-century-style castle built on the edge of a cliff.

A fascinating insight into daily life in the Eastern Bloc.