An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The ancient tomb acts as a calendar that keeps perfect time.

Medicinal spa created with the discharge from a geothermal energy plant.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

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.

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

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

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

Two volcanic lakes in an enormous crater formed in a prehistoric eruption.

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

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

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

Outlaws, hot springs, and tragedy have all left their mark on this ancient road in the Icelandic highlands.

It houses the remains of a 17th-century version of the Titanic.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."