Legend says this sacred tree was a gift from goddess Athena.

This famous archeological mystery may be an ancient example of movable type.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

An ancient octagonal weather station named for the eight Greek gods of wind.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

A bit of retro transportation flair preserved in the world's largest department store.

The first and only carousel with a lineup entirely of insects.

This abandoned subway station can still be seen on regular commuter trips.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

A celebration of capitalism in Midtown.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

Elevated freight railway turned wildly successful urban park.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The "Seinfeld" diner.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

This building was once the most magnificent mansion in Nafplio.

This building served as the first customs house in modern Greece.

This church is dedicated to the patron saint of seafarers.