The first park built over a freeway is a brutalist masterwork.

Tasked with beautifying a disused stretch of industrial land one artist filled a hole with grass.

Bonsai trees that are up to a thousand years old.

The gravestones in this lost burial ground were bulldozed and replaced with houses and a dog park.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Mysterious glowing orbs float through the desert night.

A modernist landscape of water and sci-fi concrete.

An emerald-green grotto just a short trip from Austin.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

A comprehensive collection of bonsai set in a beautiful campus.

A school-themed restaurant where gastronomy is the core curriculum.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The rogue roots are gradually consuming some of the historic marble grave markers.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

Washington's iconic carousel has a nice piece of Civil Rights history.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A derelict bit of transportation infrastructure hidden in the woods.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.