Watch the seas clash at the place where according to Maori tradition, the spirits depart for their journey to the afterlife.

A galaxy of glowworms—larvae of a gnat—hides deep in the belly of these caves.

Largest Kauri tree in New Zealand.

A table rock formation that has been intriguing West Virginians for years.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A park full of outsider art, created by college students studying outsider art.

This might just be the TARDIS of bookstores.

Mysterious rocks that ring musically when struck.

The final resting place of one of the United States's greatest poets.

A layered tribute to the work of mosaicist Isaiah Zagar.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

A daily replay of the experiment that proved the rotation of the Earth.

Yo, Adrian!

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.