El Castillo de Dublín fue símbolo del dominio inglés durante unos 7 siglos, desde que los anglo-normandos decidieron construir aquí una fortaleza. Con el pasar del tiempo, el castillo sirvió como asiento del virrey de Irlanda, un cargo asignado por los ingleses, y no fue hasta 1922 que finalmente pasó a manos del Estado Libre Irlandés. Las habitaciones del castillo exhiben una decoración imponente y suntuosa, y los jardines formales, tan impecablemente cuidados que parecen alfombras verdes, crean un aura especial, casi mágica. En el seno del castillo encontrarán insignias y objetos de colección de interés histórico. En la actualidad, el castillo es utilizado para funciones gubernamentales además de ser sede de varias agencias del gobierno. En los terrenos del castillo también se encuentran la magnífica Capilla Real y la espléndida Biblioteca Chester Beatty. Una ventana monumental al pasado medieval del país, este castillo imponente es, sin ninguna duda, una de las posesiones más invaluables de Dublín.

Una de las únicas dos catedrales anglicanas en Dublín, esta iglesia venerada está emplazada junto a los prados serenos del parque de San Patricio. Construida en el año 1192, la catedral cardinal de Glendalough es una obra maestra de la arquitectura cuyos múltiples chapiteles se alzan sobre los paisajes urbanos de Coombe, Warrenmount y Portobello. Las principales atracciones de San Patricio son las tumbas de Jonathan Swift y su compañero, que están situadas en la nave. La catedral también cuenta con la nave medieval más grande de toda Irlanda y una lápida de piedra con una cruz celta tallada en su frente que cubre el pozo del que San Patricio sacaba el agua para bendecir a sus súbditos. Los jardines que rodean la catedral son un oasis más que bienvenido en esta parte densamente poblada de la ciudad.

Designed by Francis Johnston in 1818, the General Post Office (GPO) on O'Connell Street is known as the site of the 1916 Easter Rising. Irish Volunteers seized the building on Easter Monday and for six days held out against the British until the GPO was set on fire. The building was completely restored in 1929. Inside, stands a bronze statue depicting the death of the mythical Irish warrior Cuchulainn, dedicated to those who died in the uprising. The GPO has acquired iconic status; demonstrations and protests are often held outside.

Located along Dawson Street, the Mansion House or the Teach an Ard-Mhéara is an important landmark of the city. Dating back to 1715, this house continues to serve as the residence of the Lord Mayor of Dublin. It was in this 18th – century house where the Irish Declaration of Independence was proclaimed. Notable visitors to this house include Pope John Paul II and Queen Victoria. At present, the Mansion House features two classy venues, namely Round Room and Fire Restaurant; each of these plays host to weddings, fund-raising events, charity balls, and similar functions.

Towering over the bustling O'Connell Street, the 'Monument of Light' is like a soaring needle striving to meet the heavens above. Symbolizing the true spirit of contemporary Dublin, the spire pierces through clear blue skies during the day and is an effervescent display of sparkling steel come night. Boasting a textured base, this upward-tapering 120 meters(390 feet) pillar is skirted by a troupe of historic edifices. Its imposing visage dominates the city's skyline, perpetually awarded by gazes of awe. The monumental Spire of Dublin is an incredible representation of the city's urban and technological prowess, that has also been a recipient of an array of accolades.

This Georgian building is a historically rich part of Dublin's urban landscape. Designed by James Gandon and finished in 1791, it fulfilled its designated purpose for only nine years: the 1800 Act of Union gave London control over Ireland's custom and excise, leaving the Custom House a mere symbol of former power. Election victory in 1921 for Sinn Fein saw the burning of the building, which militants considered a sign of British rule. Restoration work was finally finished as late as 1991. Pavilions, arcades and columns make up the façade, which is crowned by a vast copper dome and statue personifying Commerce. The visitor centre outlines the fascinating history of the building.

A visit to a graveyard may not be your idea of a jolly day out, but Glasnevin Cemetery is one of the most fascinating places in Dublin. It is the final resting place of some of the most famous figures in Irish history, including former Irish presidents Eamon de Valera and Sean T. O'Reilly. Other political heroes buried in its atmospheric grounds include Michael Collins, Daniel O'Connell, Charles Stewart Parnell and Roger Casement. The graves of literary figures such as Gerard Manley Hopkins and Brendan Behan can also be found. Buy a heritage map to find the key graves. Admission is free.

Official residence of the President of Ireland, this sprawling white edifice sits gracefully on verdant, rolling lawns of the massive Phoenix Park. Built in 1751 as a rather luxurious home for the park ranger, the house became the residence of successive viceroys, who oversaw British rule in Ireland. In 1938, it became home to the president of the newly-independent Ireland and today, welcomes some 15,000 visitors each year. Priding itself on its moniker 'The Irish White House', this residence is home to a massive assemblage of ornate rooms, sprawling quarters and a decadent chapel. A picture-perfect edifice replete with great Irish fervor, Áras an Uachtaráin is beautifully ornamented with columns, a framed pediment, a poised portico and gardens, the flowers of which are enlivened with bursts of color come summer. 'The Áras' has gracefully aged well over 260 years, and is indefinitely one of the most priceless possessions of Dublin.