Classic Golden Oak Treehouse in Deerpark

Adrenalin Quarry is a family-owned adventure park in Menheniot, built around an old flooded quarry. It offers five rides: an inflatable aquapark for ages 6 and over, go karting on an 800m all-weather track for ages 7 and over, a zip wire that is 50m high and 490m long, a giant swing 150ft above the lake, and axe throwing for ages 12 and over.

Tip: You can book all rides online ahead, or just turn up for the zip and the giant swing.

Dartmoor Zoological Park is a 33-acre zoo just north of Sparkwell, on the south-west edge of Dartmoor in Devon. It is run by a charity that focuses on conservation, education and research, and it belongs to BIAZA, the British and Irish Association of Zoos and Aquariums.

Restormel Castle stands on a high, deeply ditched mound overlooking the River Fowey near Lostwithiel. Its huge, almost perfectly circular keep is one of the best-preserved of its type, and it was once a luxurious residence linked to the Earls of Cornwall and Edward the Black Prince.

Tip: Bring a picnic to enjoy at the castle, and combine your visit with a walk in the Fowey valley.

The National Marine Aquarium sits in Sutton Harbour, near the Barbican in Plymouth. It is run by the Ocean Conservation Trust, a charity, and is split into four zones: Plymouth Sound, Eddystone Reef, Atlantic Ocean and Blue Planet. You'll see local sharks, rays and octopus, a jellyfish exhibit, and a huge Atlantic tank holding around 1,000 Caribbean fish, with lemon and sand tiger sharks.

Tip: Pre-book your tickets online, as entry can't be guaranteed without a booking, especially at weekends and in school holidays.

Newquay Zoo is a 13-acre zoo and garden site in Trenance Leisure Park, in the middle of Newquay. It is the largest zoo in Cornwall, and its planted grounds have won a Britain in Bloom Gold award. Visitors can see hundreds of species, including lynx, penguins, otters, zebras, sloths and meerkats, in a mix of indoor and outdoor habitats.

Tip: Check the zoo's website for current opening times, ticket offers and parking details before you go, as these can change.

The Eden Project sits in a reclaimed china clay pit in Cornwall. At the bottom of the pit are two huge domed Biomes made of inflated cells on steel frames. The Rainforest Biome is one of the largest indoor rainforests in the world, with tropical plants such as banana, coffee, rubber and giant bamboo. The Mediterranean Biome has olives, grape vines and sculptures.

Tip: Check the opening times page before you set off, as last entry to the Biomes and closing times change through the year, and some dates are closed.

Screech Owl Sanctuary & Animal Park is a home for owls and other animals on Goss Moor, near Indian Queens in mid Cornwall. Founded in 1990 by Carolyn Screech, it shows owls from around the world, with British, European, African, American, Asian, Australasian and West Indian species. It also rescues and rehabilitates wild owls in Cornwall, and there is a Siberian Eagle Owl breeding project.

Tip: If you want an owl or animal experience, call ahead to book, as busy periods may mean walk-up requests can't be fitted in.

Lanhydrock is a Victorian family home inside a Jacobean mansion, once lived in by the Agar-Robartes family. Most of the interiors were rebuilt after a fire in 1881. Inside, you can see the Long Gallery with its ornate ceiling, and families can play in the refurbished Victorian nursery.

Tip: It is busiest between 11am and 2pm, so arrive later in the day for a quieter visit and shorter queues for the house.