Things to Do in Brentwood: Free Deer Park, £15 Bunker

Brentwood is 89% green belt, and that shapes what there is to do here. Two large country parks, a Tudor house still lived in by the family that built it, an animal sanctuary, an Edwardian garden gone wild, and a Cold War bunker buried in a field at Kelvedon Hatch. Everything below was checked against the venue’s own website in August 2026, with the 2026 price where the venue publishes one.

We have flagged what is free, what needs booking, and what closes for the winter, because several of the best things here are seasonal.

Brentwood attractions at a glance

Weald Country Park: deer, lakes and a free walk

Weald is the one to take visitors to. It is over 520 acres of woodland, wildflower meadow and open grassland at Weald Road, CM14 5QS, and it has been in public hands since Essex County Council bought it in 1953 to keep it open. The land is a Grade II listed historic landscape, and it holds a Green Flag Award (Explore Essex).

The park was a medieval deer park in the 12th century, and it still keeps a fallow deer herd in an enclosure, which is the thing most children come for. There are lakes for fishing and wildlife, a visitor centre with a café and shop, two children’s play areas, an accessible path around the lake, and a 1.4km Stick Man sculpture trail.

• Opening: every day, 8:00 to dusk, including Christmas Day. The café runs Tuesday to Saturday, 9:00 to 16:00.
• Entry: free.
• Parking: £3.15 up to an hour, £4.40 up to two, £5.50 up to four, £6.55 all day. Coaches £15, booked in advance.

What it means for you: walking in costs nothing. The only bill is the car park, and if you visit country parks regularly the annual Explorer Pass covers Weald, Thorndon and five other Essex sites.

Thorndon Country Park: two halves and a Gruffalo

Thorndon, at Warley, CM13 3RZ, is the other big one: over 500 acres, also Green Flag, also run by Essex County Council. It comes in two separate halves with their own entrances.

Thorndon North is the woodland side and has the Countryside Centre with a café and shop, plus Childerditch Pond with a bird hide. Thorndon South is open parkland, picnic ground and the Heritage Trail. Between them there is a self-guided Gruffalo Trail, fishing at Old Hall Pond, a dog activity course, and bike hire through Trailnet (Explore Essex).

• Opening: every day, 8:00 to dusk, including Christmas Day.
• Entry: free. Parking is the same tariff as Weald, £3.15 to £6.55.

Grazing sheep, goats and cattle are part of an ongoing landscape restoration project, so keep dogs under close control in the grazed compartments.

Kelvedon Hatch Secret Nuclear Bunker

Signposted, slightly absurdly, off the A128 with brown tourist signs, then down a track to what looks like a bungalow. Behind it is the biggest and deepest Cold War bunker open to the public in the South East, built as a Regional Government Headquarters and intended to house hundreds of staff, up to and including the Prime Minister, in the event of nuclear war. It is now part of the Nuclear Essex site at CM15 0LA (Nuclear Essex).

The tour is self-guided by audio handset, included in the admission price, with separate adult and child commentaries following the same route. Inside there is original Civil Defence and communications equipment.

2026 admission (Nuclear Essex):

• Adults: £15
• Children (5 to 16): £13
• Family (up to 2 adults and 2 children): £38
• Groups of 15 or more: £14 per adult, £12 per child

Opening: in summer, every day, 10:00 to 16:00 on weekdays and 10:00 to 17:00 at weekends and bank holidays. Out of season it is Thursday to Sunday, 10:00 to 16:00, plus school holidays and half terms.

Coming up: the site hosts a grand classic vehicle show on Saturday 15 August 2026. One practical warning from the venue itself, worth heeding: sat navs drop short of the entrance, so keep going until you see the brown signs on the A128.

Ingatestone Hall

A 1540s Tudor mansion at Hall Lane, Ingatestone, CM4 9NR, owned and lived in by the Petre family through fifteen generations since it was built. It keeps its original Tudor form: mullioned windows, high chimneys, crow-step gables and oak-panelled rooms, set in ten acres of enclosed gardens. Visitors tour the eight principal rooms, hung with paintings and family memorabilia gathered over the centuries (Ingatestone Hall).

2026 admission (Ingatestone Hall):

• Adults: £10.50
• Pensioners: £8.40
• Children (5 to 16): £5.25
• Under fives: free

Opening: generally Wednesdays, Sundays and bank holidays, 12:00 to 17:00 with last entry at 16:00, between Easter and the end of September. Parking in the Meadow Car Park is free and picnicking there is allowed. Teas and light lunches are served in the Summer Parlour whenever the house is open.

Two things to know before you go. Special events during the season can change or suspend normal public opening, so check the hall’s events list shortly before travelling. And the house has real restrictions: no dogs except guide dogs, no unaccompanied children, no photography indoors, and no access to the upper floor for wheelchair users, because no 16th century house is easy to adapt.

Hopefield Animal Sanctuary

At Sawyer’s Hall Farm, Sawyers Hall Lane, CM15 9BZ, on the northern edge of Brentwood, Hopefield is home to nearly 700 rescued animals, from alpacas and meerkats to donkeys, pigs and cattle. It opens to the public to raise funds, and it has a children’s play area and Max’s Café, which serves plant-based food (Hopefield Animal Sanctuary).

2026 admission, booked online:

• Adult: £9.50
• Child (2 to 15): £8.50
• Concession: £7.50
• Family of 2: £17.00. Family of 4: £34.00
• Under 2s: free

Prices include an optional £1 per person donation, and there is a £1.50 per person surcharge if you pay at the gate, so book ahead. Groups of 12 or more must book in advance. Prices can differ on event days.

The sanctuary closes for the winter and reopened on 27 March 2026 for the season, running through to December. Events this summer and autumn include the End of Summer Carnival over the August bank holiday weekend, a Doggy Fun Day on 6 September and a Cars and Crafts show on 27 September. Do not feed the animals: many are elderly or on special diets, and the sanctuary enforces this.

Warley Place: a lost garden, free

Warley Place, on Warley Road at Great Warley, CM13 3HU, is 25 acres of the grounds of the Edwardian estate of Ellen Willmott, one of the most celebrated horticulturists of her day, who remodelled the gardens and filled them with plants collected from around the world. The house is gone and the garden has returned to woodland, but the planting keeps coming back: snowdrops, crocuses, daffodils and bluebells in spring, plus surviving magnolias, camellias, ferns and sweet chestnuts. Essex Wildlife Trust now manages it, and volunteers have restored parts of it (Essex Wildlife Trust).

Opening: every day during daylight hours. Entry: free. There is a small car park at the end of the drive, next to the Thatchers Arms on the B186.

It is not a manicured site. There are uneven surfaces, hidden cellars and decaying structures, so stay on the marked footpaths, and it takes assistance dogs only. February and March, when the snowdrops and bulbs are out, is the visit worth planning for.

Brentwood Cathedral

Free to look at, and genuinely unusual. Brentwood’s Catholic cathedral began in 1861 as a Gothic Revival parish church, was raised to cathedral status when the Diocese of Brentwood was created on 20 July 1917, and was then enlarged between 1989 and 1991 in an Italianate classical style by the architect Quinlan Terry. Cardinal Basil Hume dedicated the new building on 31 May 1991, and it was listed at Grade II in 2022 (Brentwood Cathedral).

Above the nave arcade are terracotta roundels of the Stations of the Cross, designed by Raphael Maklouf, the sculptor behind the portrait of Queen Elizabeth II used on Commonwealth coins from 1985 to 1997. It is a working parish church on Ingrave Road, so time a visit around the published Mass schedule.

Brentwood Museum

A cottage museum on Lorne Road, Warley Hill, CM14 5HH, holding hundreds of household objects from everyday Brentwood life, along with displays on the town’s military and industrial past and its schools. Admission is free, with donations welcome (Brentwood Museum).

The catch is the opening. It opens on the first full weekend of each month from April to October, plus the Monday: Saturday and Sunday 14:30 to 16:30, Monday 10:30 to 12:30. The remaining 2026 dates are 5 to 7 September and 3 to 5 October. Miss those and you wait a month.

Old MacDonald’s Farm

A family farm and fun park on Weald Road, CM14 5AY, about ten minutes from M25 junction 28, with animals, rides, playgrounds and a summer circus. It is open seven days a week, 10:00 to 17:00, and all rides are included in the entrance price (Old MacDonald’s Farm).

Admission is priced per date through the farm’s own booking system rather than published as a flat rate, and it advertises up to 25% off for booking in advance online, so check before you turn up. Halloween shifts the hours to 09:30 to 16:30, with separately ticketed Pumpkin Nights from 17:00 to 19:30.

Getting there and parking

Almost everything on this list is easier by car, and the country parks and Ingatestone Hall have their own car parks. For the town centre, Brentwood Borough Council’s car parks give 30 minutes free once a day and are free on Sundays; the tariffs are in our roadworks, parking and travel page. If you are coming from London, Brentwood, Shenfield and Ingatestone all have direct trains, and Ingatestone station is a short walk from the Hall. Times and fares are in our trains to London page.

Sources

• Explore Essex, Weald Country Park and Thorndon Country Park
• Nuclear Essex, the Kelvedon Hatch bunker
• Ingatestone Hall, visiting
• Hopefield Animal Sanctuary, visit
• Essex Wildlife Trust, Warley Place
• Brentwood Cathedral, history and guide
• Brentwood Museum
• Old MacDonald’s Farm, opening times

Prices and opening times were checked against each venue’s own website on 9 August 2026. Seasonal venues change their hours, so confirm before you set off.