Where the oil industry began.

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."

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

Some of the saint's blood and bones are said to reside in Dublin.

The modern birthplace of Irish freedom.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Monument to a suicide protesting the Soviet invasion.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Two stunning 17th-century libraries and a cabinet of curiosities.

Looming communist pillar with a Czech twist.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

The world's tallest boat lift stands as a massive piece of industrial tourism.

Hear the quietest sound from across the dome.

An unusual round church in London with a Templar past.

A naturally mummified 2,000-year-old man.

The celebrated eyesore created by starry-eyed sweethearts.

Cold war icon and onetime "hole" in the iron curtain.

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

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

Meet the bronze beloved pet to a family of famous peeing statues.

Six turbines towering over a wide road for passersby.