Five mythical trolls have taken up residence in woods and hidden on paths at the Coastal Maine Botanical Gardens.

These massive concrete balls were used to mine gold in Virginia.

On the side of a Virginia highway, a collection of monuments commemorates an 18th-century trek through the Blue Ridge Mountains.

The whole world in one water tank.

One of the earliest and best-preserved buildings in Charles County, Maryland.

Dr Barnes' $25 billion private collection of art and arboretum.

The ruins of an 18th-century mansion that was once named "Mistake" by the man who had it built.

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

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

A popular Icelandic children's story comes to life inside this cave.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

This educational and eco-friendly community is Iceland's "home of the sun."

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

Three columns of volcanic rock shoot out of the ocean.

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

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

A restaurant devoted to "trouser grip" wrestling, an ancient form of Viking wrestling that is Iceland's national sport.

The Hveragerði fissure runs through this unassuming shopping center.

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

This beautiful, historic church looks like something out of a simpler past.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This hilarious English intersection is an automotive whirlpool.