Only known mainland rookery of the threatened Stellar sea lion.

On the Oregon coast there is a natural hole that seems to be draining the sea.

This highest peak in New Mexico is named after an explorer who had a habit of lending his monicker to peaks.

A museum devoted entirely to the rattlesnakes and snake-related art.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

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

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

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.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

The winter home of thousands of beautiful snow geese and sandhill cranes.

Life-sized sculpture of a blue whale made of hand-recycled plastic trash.

The most powerful laboratory radiation source in the world pulses with 1,000 times the electricity of a lightning bolt.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

The oldest licensed distillery in Ireland.

After being destroyed by IRA sympathizers, the ruins of this stately Irish manor have sat vacant for decades.

The oldest public library in Ireland.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

Roman ruins top white travertine terraces formed by ancient hot springs.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Open-air museum with an elaborate sculpture garden, stretching for over 70,000 square-meters.

The most visited, and possibly most controversial, museum in Germany.