This once rural mansion now sits in the heart of the city.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

A massive sustainable farm designed by the mastermind behind Central Park.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

One of Ireland's most infamous prisons for rebels including men, women and children.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The ancient tomb acts as a calendar that keeps perfect time.

A circus legend leaves an unexpected endowment.

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

A museum marks and documents the site of the Titanic's launch.

Northern Ireland's Brobdingnagian stepping stones.

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