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

A restaurant with an extensive Irish whiskey bar also has several first editions of famous works by Irish authors.

Built to replace a house destroyed by a hurricane, this home is made entirely of shipping containers.

Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

Georgia may have been on his mind, but this memorial in Florida shows that Greenville was really Ray Charles's childhood home.

The snowbirds here are circus sideshow performers.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

One of the world’s largest living advertisements is made out of pine trees.

Abandoned concert venue legendary for its rock counterculture.

The first artificial white water river course in North America cuts right through an Indiana city.

This freshwater spring fills with 10,000 gallons of water per minute.

This observatory comes complete with three separate telescopes and a dedicated community of amateur and expert astronomers.

The world's largest collection of mechanical puzzles is a cornucopia of analog bafflers.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

Ancient ruins hidden underneath a modern luxury hotel.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

An unsanctioned shrine that sprung up outside the late singer's home is causing a stir in London's Highgate neighborhood.