One of the largest and oldest caravansaries in Persia.

This lonely tower survived the landslide that devastated much of a Mexican mining town.

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

Years of neglect and nature took a toll on this 19th-century lighthouse.

In France, a medieval-style home pays homage to an intrepid explorer who discovered Québec.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

Its dark depths conceal millions of rare, delicate crystal formations.

Once the largest factory complex in all of Europe, this converted shopping center celebrates its industrial past in a big way.

Twelve hundred stone carvings guard this off-the-beaten-path Buddhist temple.

Once a palace for the Archbishop of York, these 15th-century ruins now serve as a haunt for history buffs.

These ruins of a sacred Ancient Greek temple stand next to a luxurious modern resort.

A tiny, heartwarming piece of art hiding in plain sight.

The unusual sculptures are believed to be powerful political symbols.

English Protestants once criticized this enormous private chapel for being too ornate.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

This colonial town in Colombia sits around the largest stone paved square in South America.

One of the biggest markets in Asia, under one of the continent's largest domes.

This small museum tucked within a subway station holds pieces from Madrid's past.

The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

An enchanting work of outsider art, full of whimsical sculptures and carvings.

You can climb to the top of the column built to honor the "father of British inland navigation."