This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

A beautiful geyser under environmental threat.

No Gordon Lightfoot song, only a barebones monument to greed.

Home to the deepest rift anywhere on Earth.

Fossils, railroads, and waterfalls!

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

Every fall this lake mysteriously drains, like a bathtub with the plug pulled out.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Singing sand that stands as the final remains of an ancient lake.

Open-air museum with a large collection of Soviet-era statues.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

The 3.8 billion-year-old rock proves that tectonic plates may have been shifting longer than we thought.

Geodesic dome luxury retreat in the Scottish Highlands.

British Empire's last territorial expansion, claimed by four countries.

The abandoned village of Skarð aptly illustrates the idiom "Don't put all your eggs in one basket."

Three columns of volcanic rock shoot out of the ocean.

Rising from the sea like a stone monster.

Largest private bird collection in Iceland, formed from a tragic accident.