A reproduction of earth's many biomes.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

An homage to everyone's favorite prehistoric cartoon family.

Ancient pueblos built into the base of a natural canyon wall.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A motel dedicated to Southwestern nostalgia.

The magic's in the hole!

Portlandia is the second-largest copper repoussé statue in the United States.

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Singapore's landscaping project is home to 18 incredible Supertrees.

The most playful of the life-sized statues that make up Singapore's "People of the River."

A Buddhist theme park brings you a Buddhist version of Hell.

This impressive Boston holy house is the American mecca for Christian scientists.

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The house where John Wilkes Booth conspired with his co-conspirators.

The United States Capitol's former columns still stand.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Art deco landmark on the outskirts of Washington, D.C.

Largest Roman Catholic church in North America.