The block of aged dairy is probably still edible after 2,300 years in a peat bog.

A hugely vast Irish landscape of barren rock that stretches for miles.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

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

A natural formation that resembles a camel resting in the New Mexico desert.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

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

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.

These markers are used to document elevation changes around the famed dam.

The only thing still moving in this town is the eponymous hot spring.

This rest area is also home to a remarkable petroglyph site.

Named after an outlaw who used the basin as a hideout.

This Stonehenge-inspired solar calendar stands alongside a landfill, in the middle of the Nevada desert.

This sign designates the road that leads to the infamous Area 51.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.