One of Frank Lloyd Wright's final works was this UFO church.

Take a break from all the boring business of death at this funeral home mini-golf course.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

Robots, lasers, and whoopee cushions, oh my!

The remains of a Rockefeller's lush Italianate estate hidden in the underbrush on the coast of Lake Michigan.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The curious underground history of keeping Paris clean.

The world's largest collection of intentionally useless inventions.

A church of bones, decorated with 40,000 human skeletons.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A grassy pyramid named after a French battle.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

New York City's smallest piece of private property.

An artist's cute bronze subway sculptures belie his violent artistic past.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

A modern zoetrope on the New York City subway.

The most confusing clock in New York.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

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

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

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

A whimsical, but often overlooked clock in Park Avenue.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

A Manhattan office building is home to the world's largest chess board.