An ancient glacial pothole waterfall in the heart of the Green Mountains.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

A long-forgotten Victorian swimming hole is still a fun spot for a dip.

A gas station and a state sign commemorating the most famous claims of extraterrestrial abduction.

Final resting places of a husband and wife who became famous for their claims of extraterrestrial abduction.

University of New Hampshire holds the documentation and artifacts of local alien abductees.

The simple log cabin of a famed loner and naturalist stands preserved as a symbol of the ultimate DIY lifestyle.

Hollowed out cedar log tubs set in an ancient towering forest.

This chilly Canadian hotel has a four-month lifespan due to the unusual material it's made of.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A small memorial commemorates a man who died at Kilkee Cliffs.

After a traumatic encounter with a six-foot eel, one Galway baker started making a daily loaf of sourdough in its shape.

A Neolithic passage tomb said to have sheltered two legendary Irish lovers.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

An outstanding and haunting glimpse of the horrors of the Great Famine of Ireland.

An important pilgrimage site for pagans and early Christians, named for a Celtic goddess-turned-saint.

This Irish museum in a historic 19th century market pays tribute to the glory of butter.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

An ancient neolithic tomb that only sees the sun twice a year.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

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