In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

This deadly little sliver of beach has seen hundreds of whales beach themselves over the years.

This strange geological landscape erupts with sudden bursts of water.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

New Zealand's epic shrine to all things puzzling.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

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

Copenhagen's celebrated theme park and gardens.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Where Nor'easters go to die.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Red frames showcase remnants of one of New York's original subway stations.

America's first federal monument.

Glacial erratic or man-made dolmen? It probably wasn't druids.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.