The last original stone marking the interwar border between Germany and Poland sits in this unassuming village park.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

The highest waterfall between the Rockies and the Appalachian Mountains.

Cathedral-like Victorian vaults are hidden within this iconic bridge.

Visit a secretive crypt before it crumbles to dust.

Nature (and graffiti) reclaim this old waterworks that has been surrounded by a bike path and network of walking trails.

This formerly-prosperous Silesian mining town was completely demolished in the late 1960s and early 1970s as an attempt to cover up a secret Soviet uranium mine.

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.

The only natural cave bath in all of Europe.

Over 40 species of fern cover the canyon walls of this lush green bowl, cut off from the bustle of the world by a cave entrance.

A cenote sitting in the middle of a parking lot shows the Yucatán Peninsula at its most urbanized.

The ruins of a military fortification sit atop this mountain.

A place of enchantment where stories of the past seem to come to life.

A sculpture of three large candles in the middle of the water of the river Smedjeån.

Superb sweets await at the first Jewish bakery inducted into Berlin’s prestigious baker’s guild.

This family-owned restaurant celebrates Native American cuisine.

The remains of one of Wales’ great medieval buildings, with a pub in the cellar.

Fears of Satanic worshippers swirl around five Celtic-inspired megaliths.

This cupola was once seen as an architectural disaster.

The exit of the largest prisoner-of-war escape attempt on American soil during World War II.

This canyon is named for a unique geologic formation where the river vanishes underground near the mouth of the canyon and reappears farther down.

The site of an early Arthurian battle and the dwelling-place of prehistoric people and (possibly) an ancient race of giants.

Crystal clear, drinkable mountain spring water by the side of the road.

This abandoned IDGZ station was one of 49 troposcatter stations in the NATO ACE High network.