This disused VLF radio station is no longer in service but the surrounding town still bears its name.

The world's only museum devoted to the wonders of fluorescence.

An endless sea of white conical domes.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

The central mosque of this Mali town is entirely built from mud.

Topless shrine of northern Ghana.

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

A Roman monument to their own civil engineering prowess.

Longest fortress system anywhere in Europe.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

Bridge that died in war and was resurected.

A giant portrait of an ancient king looms over the river.

A misnamed well, with a deep dark past.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

Two bulls enter. One leaves a champion—but neither loses its life.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

A forgotten monument to Yugoslavian freedom.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

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

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

Yugoslavia's biggest underground airport lies in ruins.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

A unique underground structure dating back to the 1st century BC.

Personal garden filled with mosaics made of recycled garbage.