From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This dark, damp, perilous tunnel is the only passage from north to south Tajikistan.

The world's second-tallest flagpole stands proud despite dropping rank.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

This former Cyprus flight hub is now a crumbling, abandoned ghost complex.

Roman ruins top white travertine terraces formed by ancient hot springs.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

A marvel of Byzantine engineering under the streets of Istanbul.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

1513 Turkish world map, full of European state secrets and snarky commentary.

Ancient serpentine sacrifice holder that has stood the test of time.

The longest continuous lava tube in Oregon.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Built to bless whalers before their voyages, this Massachusetts church now features a ship-shaped pulpit.

Mysterious stone tower featured in many alternative histories of the New World.

To avoid the demolition costs this abandoned drawbridge was simply left in the up position.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.