This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

The site of the first battle of World War II.

This Victorian water wheel is affectionately nicknamed "Little Isabella."

A 150-year-old steam locomotive crosses the southern half of the island daily.

Mysterious chains and iron stakes adorn this strange grave, with no explanation.

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

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Experience what life was like in Ireland during the Viking and medieval ages.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

Finnish lake, and scene of an infamous murder mystery.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

These Finnish rapids have been attracting tourists for over a hundred years and are now released with the push of a button.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This intricately spiralling forest was created as a monumental work of art.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This one-time health resort was used by aristocrats around the world.

Home of the first female Hungarian poet, where her secret writing lay hidden for over a century.

17th century palace once a meeting place for politicians.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.