The house is indeed beautiful...and haunting for fans of the series. If you stand on the street and face away from the house, then you can see down to the waterfront which makes the house seem even that much more mysterious. The Pacific Northwest makes an incredible background for this location.
Truly one of the most daring experiences I've had in nature. I've always been a little squeamish with heights, but this is one place where the view is worth it. There's a brochure before you cross the rope bridge that states it's as high as the Statue of Liberty's shoulder.
The bridge does swing with all of the traffic going across on it, so you want to make sure you hold your phone/camera with both hands, but you'll definitely want to get photos upstream and downstream. There's even a vantage point in the park where you can look back and see exactly where you crossed.
I also really enjoyed the Tree Village where you can walk from treehouse to treehouse while in the tree canopy. There are several signs that point out local wildlife and describe the rainforest in which you're standing. It's straight out of an Ewok adventure but with history.
Cliffwalk is their newest attraction and allows you to walk out into the canyon from a path that is attached to the mountain wall hundreds of feet above the ground.
There are also several eateries, an opportunity to see falcons and owls, and First Nations totem poles throughout the park.
Whatcom Falls is a restorative place to stretch your legs and lose yourself in nature. You can either walk across the stone bridge (a WPA project - beautiful in itself), or you can find one of the lesser footpaths to walk down to the base of the falls. From there, you can trek your way under the bridge for both a look up at the falls or down the river. There's also a water chute that made me think of how fun it would be to use it as s slide down into the river.
It's an easy five-minute drive off of I-5 if you're heading from Seattle to Vancouver.