Forts

This medieval fortress guards a monastery near the border of Serbia and Montenegro.

If you dare visit this fort, fire-breathing hyenas might devour your camels.

One of the most studied Iron Age settlements in Europe.

Northern Europe’s largest castle ruins sit precariously on an island cliffside.

The gnarled remains of an exploded German bunker from World War II sit along a breathtaking fjord.

This American Civil War-era fort still stands near the border between Washington, D.C. and Maryland.

This abandoned but well-preserved Prussian fortress sits abandoned in a Polish forest near the German border.

A former prison within a seaside fort has now been turned into an interactive museum.

The site of one of the only two star-shaped forts in Japan was used as an elementary school for over a century, much longer than its life as a castle.

Fascinating military history, awe-inspiring wildlife encounters, and endless outdoor adventures draw people to this sprawling park.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

The famous sculptor had a hand in this imposing fortress.

Constructed for defense, this fort oversaw the dress rehearsal for one of the largest invasions in history.

This cannon was part of a 16th-century fort near Miramar Beach in Panaji.

Named for a prominent scout and explorer, this Wyoming state park encompasses a replica of an 1840s trading post, a 19th-century Army outpost, and early 20th-century automobile lodgings.

The remains of a 13th-century Romanesque church lie abandoned on a hillside.

This replica of a 16th-century French settlement memorializes one of the earliest attempts at a European settlement in North America.