A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

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

Bathe in these natural hot springs located high in the Andes Mountains.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

According to the experts at the Guinness World's Record office, this is the longest candy counter in the world.

Come for the gun-toting hillbilly madman, stay for the ice-cream loving basketball bears.

Packed with gear and memorabilia, this museum chronicles the history of skiing and how its rise shaped New England.

A serene plaza that commemorates one of the Granite State's most iconic figures.

Even Henry David Thoreau found this glacial pothole irresistible.

Rock face that shares a name with Mary Shelley's famous doctor.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

The grave of Mrs. Reginald Hargreaves, who inspired the tale 'Alice in Wonderland.'

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

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

An encyclopedic collection of mammal penises.

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

Iceland's tribute to its thankless civil servants.

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

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