Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

A giant Troll lurks under one of Seattle's oldest bridges.

Granny Smiths and Fujis can both be traced back to Kazakhstan, where apples still grow wild.

The world's largest bioluminescent area was undiscovered by science until 2005.

A miscalculation turns a very shallow freshwater lake into a very deep saltwater lake.

An enormous, inside-out glass globe built in 1935.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The eccentric midcentury home of a suspected mafia gun-runner.

A painfully obvious spy house sits right across the street from the Russian Embassy.

The world’s largest underwater sculpture is found just off the coast of Nassau.

Budapest's Communist-era statues, banished to the suburbs.

This modern monument to pagan belief looks like it was transported straight from ancient times.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

A prized globe signed by Amelia Earhart and Charles Lindbergh sits in the Brooklyn office of the American Geographical Society.

A tunnel with windows, so you don't miss out on the impressive views.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

A popular 19th-century natural landmark is now hidden within a sprawling forest.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

Settled in 1696, abandoned after the Revolutionary War.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A sign marks the plane crash that caused two nuclear bombs to fall in North Carolina.

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.