Submerged lava formations create incredible waterworks.

Football field-sized microalgae production tanks on the Hawaiian coast create a stunning view from space.

This WWII plane died a quiet death, and is now a garden eel playground.

This Soviet statue is based on a piece of propaganda that's been elevated to national myth.

Local lore says this 700-year-old tree has sacred and medicinal properties.

This sprawling market is a one-stop shop for traditional Kazakh foods, from mare’s milk to sheep’s head.

An abandoned Soviet-era mining town in the mountains of South Kazakhstan.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

What was once England's second-richest abbey is now a haunting ruin.

The remains of a remote village that once housed over 1,200 dam workers and their families.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

A desiccated merman and a walrus penis bone are among the oddities in this eclectic collection of shipwreck treasures.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

An overgrown and abandoned tuberculosis ward resides in the midst of a quaint modern neighborhood.

The haunting ruins of Jack London's dream house.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.