This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

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

A modern mechanical planetary system, part of a 10,000 year clock.

Olfactory delights in San Francisco's Botanical Gardens.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Golden Gate Park's historic collection of plants.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

See massive fossils that are over 200 million years old in northeastern Arizona.

One of the world's largest model railroads is a mind-boggling achievement.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

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

Iceland's tribute to its thankless civil servants.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This stunning concert hall has become a symbol of Iceland's national recovery.

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

An encyclopedic collection of mammal penises.