A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.

A leafy, peaceful oasis nestled in the heart of Glasgow's busy south side.

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

An American ghost town hides along a side street in Scotland's capital.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

World's largest working waterwheel has been around for over 150 years.

This Victorian water wheel is affectionately nicknamed "Little Isabella."

The remains of the wrecked steam trawler can be found on the beach at low tide.

Believed to be the birthplace of John Balliol.

Across the islands, baked goods, sauces, and much more are for sale 24/7.

360° views of the city plus five floors of optical illusions and hands-on science.

A historic cave in Scotland once served as a hiding place for a famous Covenanter.

The beloved war-time celebrity spent time in the area before retiring to the Edinburgh Zoo.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

The gutted remains of this Estonian mansion are a monument to a tragic love.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

This behemoth bovine guards an Estonian town and is a memorial to the lost species.

A wooden statue of an Estonian pagan god and King of the Setos stands atop a sacred hill.

The Guardian of Tallinn.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

Two well-hidden huts let animal lovers spend the night among the bears, wolves, and other predators of the forest.