They squeal, they nosh, they look like predators.

One of the deepest blue holes in the world.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

The highest point of this Balearic island is home to a historic monastery.

The biggest depiction of Don Quixote's love interest in the whole world.

To fit bodies into this Renaissance crypt, they were first left to decompose in the crypt's rotting room.

This Roman arena once played host to bloody gladiatorial battles.

A dictator's failed public works project has been reborn as two linked trails through spectacular scenery.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

Stunning Roman aqueduct used for 1900 years and still standing.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

Multiple waterfalls and several historic CCC buildings anchor this state park in Oregon's Willamette Valley.

Atop an active stratovolcano, two lakes separated by a narrow strip of land.

This Portland Art gallery doubles as a studio that supports adults with intellectual and developmental disabilities.

A Roman-style column in Oregon hides a spiral staircase inside.

This sandstone mansion was the home of two of Oregon's most important pioneers.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

A volcanic fissure over two miles long and up to 70 feet deep.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.