The summer tourists on these cliffs are thousands of seabirds.

Three columns of volcanic rock shoot out of the ocean.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

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

The most powerful waterfall in all of Europe.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Walk in the footsteps of the gods and straddle two tectonic plates.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Before Nixon, "watergate" meant canals.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

These abandoned waterworks are crumbling into the Potomac River.

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

This Brazilian town built by Freemasons is full of colonial Masonic architecture and symbolic imagery.

A 125-meter long "tribute to the Brazilian people."

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.