This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

The world's smallest drawbridge.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

Yo, Adrian!

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

The oldest farmer's market in America is so ancient it was approved by the King of England.

The first of Lancaster's "rural cemeteries."

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

Impressive mining ruins overlook a spectacular view of Ireland's Copper Coast.

The ancient tomb acts as a calendar that keeps perfect time.

The modern birthplace of Irish freedom.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

These enlarged egg sculptures represent the native birds of eastern Iceland.

The most powerful waterfall in all of Europe.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.