This ultra-modern burial building would have stacked the dead like a giant filing cabinet.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

An early 20th-century bullring converted into a modern shopping center.

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Costa Rica's best known combat zone, used during the Battle of Santa Rosa.

This Costa Rican chapel is the most metal church in the world, literally.

There is a small island in the Gulf of Nicoya where the only human inhabitants are dead.

This abandoned hospital is one of the most haunted places in Costa Rica.

Once the foundation for a mansion, these ruins now offer amazing panoramic coastal views.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

This vibrant side road in Doha was painted light blue to reduce heat.

This seemingly random 30-foot statue of an oryx in Qatar's capital was a mascot for the 2006 Asian Games.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

A superb spot to appreciate the traditional boats of the Indian Ocean.

The enormous diamond-shaped building packs a trove of academic and literary treasures into one futuristic space.

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

This unique museum doesn't shy away from highlighting Qatar's role in the history of slavery.

Qatar's oldest market can trace its origins back more than a century.