Tiny castle in the middle of the Rhine made you pay to pass.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

A former ironworks that was the first UNESCO industrial site.

This rock resembling a turned-up boot has become the symbol of St. Ingbert.

Germany has its very own Centralia, whose spark remains attributed to "spontaneous combustion."

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

A futuristic rocket marks the spot where three borders meet.

An insight into the town's history of tobacco farming and involvement in World War II.

Home to the last shore-based whaling station in Australia.

A chunk of Skylab debris adorns this small museum at a roadside motel in Western Australia.

This bell was once used to summon rescue crews when ships fell victim to the treacherous waterways.

A symbol of the early days of skiing in Australia

A tribute to the fallen of World War I now honors all who have lost their lives to war.

A replica of an early 19th-century vessel that sailed across the world.

This water wheel turned to stone in a matter of decades.

A cairn commemorating James Cook's second landing in Australia.

This former convent has been reimagined as a community center for artists.

When it was built in 1916, this bridge was critical infrastructure for local farmers. Today, it's being restored for walking and biking.

Saved by the community from destruction, this sign has become a national treasure.

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.

The name for this waterfall was derived from the Aboriginal word used to describe a rainforest vine.

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

Mind the rock monster at this cave.

Somewhat controversial when first unveiled, this gathering of sea creatures has become a hidden gem.