It's said that visitors can "see" Tasmania inside this cave.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

A natural rock bridge towers above the sea.

A friendly monster lurks outside the State Library Victoria.

Children's author May Gibbs's beloved stories about the tiny, human-like "Gumnut Babies" are immortalized in bronze.

Commemorating the 19th-century labor movement in Australia.

Once housing children next to hardened criminals this historic jail once displayed Ned Kelly's skull until it was stolen.

This classic photo booth was saved from destruction by the local community.

A historic model village was gifted from residents of London to Melbourne as thanks for their help during World War II.

The 18th-century home was disassembled into 253 cases and brought all the way from the other side of the world.

A bronze statue pays tribute to the Hungarian player and coach, one of soccer's first international superstars.

From the late 19th century until the 1960s, these stone-lined "stumps" were a popular place for people to air their views on local and international issues.

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 home of Ireland's last leprechauns is officially protected by the European Union.

This indoor ski resort has a mountain contained inside a mall.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This artificial archipelago was supposed to resemble a map of the world.

This massive monument has been telling the time for 150 years—at a slight angle.

Belfast's namesake river still winds below the city center, hidden from sight.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

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

These engineering masterpieces are a dominant feature of the Belfast skyline.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.