These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

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

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

The decaying remains of a once-luxurious Soviet spa town.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

This hulking behemoth is actually five interconnected towers built in the 1960s.

This densely-packed cluster of buildings was saved from the wrecking ball and turned into an art community.

These charming mailboxes became social media stars after a typhoon failed to topple them.

Only through deep darkness and tragedy did this elaborate royal palace become a sacred temple.

The tangled roots of a giant banyan tree have fully reclaimed the ruins of this abandoned warehouse.

Grandpa Rainbow felt the neighborhood needed some color, so he picked up a paintbrush and went to work.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

A Japanese train station built around a 700-year-old camphor tree.

A moss-covered statue of a Japanese Buddhist deity stands at a quiet temple in downtown Osaka.

This bar is filled with Star Wars merchandise from around the world, all of it unlicensed knockoffs.

An eerie maze of industrial factories looks like something out of a dystopian sci-fi.

A flight of this "ghost staircase" has 40 steps on the way up, but only 39 steps on the way down.

A King Kong-like gorilla hangs from the top of this commercial building in Tokyo.

The Hanshin Expressway goes right through its 5th, 6th, and 7th floors.

Peace Park and the Atomic Bomb Dome.

A steaming, boiling hellscape sources Hokkaido's thermal baths.