The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Millions of numbers carved in glass represent the tattoos forced upon victims.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

A massive Montreal stadium that has seen nothing but trouble since its inception.

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

Come for the flowers, stay for the bats!

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Tubing through a cave lit with glowworms is a magical underground experience.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

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.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

An encyclopedic collection of mammal penises.

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

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

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

Where a rare geological phenomenon created a section of rock that resembles a checkerboard.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

One of the few brewers in the U.S. experimenting with hop-free beers.