A historic arena where the Beatles played their first concert in the U.S.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

Painstakingly built dioramas sit unnoticed in a Boston office building.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Olfactory delights in San Francisco's Botanical Gardens.

A psychedelic labyrinth on the San Francisco bay.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

This Old Testament garden features 100 plants from biblical times.

Israel's first dedicated natural history museum is home to 5 million specimens and still growing.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.